presentation environmental pollution ppt

Plastic Pollution

A global overview from our world in data.

These slides provide a global overview of plastics production, waste, and pollution of our oceans. They are designed to provide a summary of the plastics challenge and what this tells us about how to address it. A more detailed exploration of this topic can be found at our topic page on Plastic Pollution

• How much plastic does the world produce?
• What is the fate of our plastics?
• How much plastic waste do we produce & how much ends up in the ocean?
• Where does plastic waste come from?
• How much plastic waste is traded?
• How do we tackle plastic pollution?

Annual global production of plastics has increased more than 200-fold since 1950.

In 2019 the world produced more than 450 million tonnes of plastic.

By 2019 cumulative plastic production was around 9.5 billion tonnes.

This is equivalent to more than one tonne of plastic for every person alive today.

Of the global plastic produced over the period from 1950 to 2015:

• 55% straight to landfill
• 30% was still in use
• 8% was incinerated
• 6-7% was recycled

Of 5.8 billion tonnes of plastic no longer in use, ~9% was recycled.

You can explore how the trend in global recycling, incineration and landfill has changed over time here .

Whilst recycling is preferable to incineration or landfill by displacing new plastic production, most plastic can be recycled only once or twice .

This means that most recycled plastic eventually ends up in landfill or incineration.

"Recycling delays, rather than avoids, final disposal" (Geyer et al. 2017)

The world produces around 350 million tonnes of plastic waste each year.

Estimates vary, but studies suggest that 1 to 2 million tonnes enter the oceans annually.

That means 0.5% of plastic waste ends up in the ocean.

We can answer this in multiple ways:

• By land-based and marine sources
• By country or region

Packaging is the largest contributor to plastic waste.

Plastic waste can arise from land (via coastlines and rivers) and from marine sources (such as fishing nets, ropes, lines and abandoned vessels).

How significant is each source for ocean plastics?

However, in certain locations, marine sources can be more significant. The Great Pacific Garbage Patch has more than half (52%) from marine sources due to intensive fishing activity in the Pacific Ocean.

To identify the main geographical contributors to plastic pollution, we need to explore these figures in several steps:

• How much total plastic waste is generated by country
• How much plastic waste is generated by coastal populations - this is plastic which is most at risk of entering the ocean
• How much of coastal plastic waste is mismanaged (open, dumped or not enclosed) and can therefore enter waterways.

This interactive map shows the total plastic waste generation by country in 2010.

Here we see that the largest producers (China, USA, Brazil, Germany, Japan, Pakistan, Nigeria) span all continents.

But to understand the largest contributors to plastic pollution, we must correct for:

• coastal populations (taken as populations within 50km of a coastline)
• how much of this plastic is 'mismanaged'

Mismanaged plastic waste is waste which is inadequately managed (seen in the chart opposite), plus littered waste (seen here ).

High-income countries tend to have effective waste management systems and therefore low levels of inadequately managed waste.

Once we correct for these factors we can understand the geographical distribution of plastic waste at high risk of entering the ocean.

Here we see very strong regional dominance particularly across Asia.

When we aggregate by region we see the majority of plastic at risk of entering the ocean arises from Asia and Africa, with the Americas playing a notable role.

Global trade of plastics has changed a lot in the last few years.

Historically, China has been the largest plastic importer. But in 2017, it banned imports of non-industrial plastic waste.

A number of other middle-income countries have done the same.

We can see this income group's share of global plastic imports has fallen dramatically

You can also see that the amount of plastic waste that rich countries export has fallen.

This is because middle-income countries are less willing to trade.

“If we all do a little, we’ll only achieve a little”

David mackay (sustainable energy without the hot air), high-impact immediate priorities:, development of effective waste management infrastructure in all countries.

Most ocean plastic arises from countries with poor waste management infrastructure.

Cease plastic trade from rich to low or middle-income countries without sufficient investment in waste management infrastructure

The largest plastic exporters are some of the world's richest countries.

Rich countries should handle waste domestically & cease trade of plastic trade unless sufficient infrastructure is in place. A tax for exporting countries is one suggested method of raising funds for waste management services.

Strict legislation and management of fishing activity and waste

Marine plastics can be a major source of ocean pollution (most notably the Great Pacific Garbage Patch ).

Fishing activity should be better-regulated and managed to limit these sources.

Longer-term shifts in consumption models

• How essential plastic is in many aspects (e.g. preventing food losses & waste, sterile environments, construction, medical supplies)
• Plastic alternatives often have other environmental impacts . There are usually trade-offs
• To be globally effective, must be scalable and cheap

Explore this topic in detail at our:

Main topic on plastic pollution.

About the author: Hannah Ritchie is a scientist at the University of Oxford. She is a Researcher at the Oxford Martin Programme on Global Development . About Our World in Data: Our World in Data is an online publication that shows how living conditions are changing. The aim is to give a global overview and to show changes over the very long run, so that we can see where we are coming from, where we are today, and what is possible for the future. www.ourworldindata.org | @HannahRitchie02

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ENVIRONMENTAL POLLUTION

Jan 05, 2020

830 likes | 905 Views

ENVIRONMENTAL POLLUTION. By Miss. M. Shanthi MCA. Definition of Pollution. When Harmful Substances Contaminate the environment it is Called Pollution.

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Presentation Transcript

ENVIRONMENTAL POLLUTION By Miss. M. Shanthi MCA

Definition of Pollution • When Harmful Substances Contaminate the environment it is Called Pollution. • It can be defined as any undesirable change in the physical, chemical, biological characteristics of any component of the environment which can cause harm to life and property.

Types of Pollution

Air pollution

What is Atmosphere? • Atmosphere is the life blanket of Earth.

Air.... • Air supplies us with oxygen which is essential for our bodies to live. • Air is a mixture of nitrogen, oxygen, water vapor, carbon dioxide and inert gases. • Human activities can release substances into the air, some of which can cause problems to humans, plants, and animals. • Natural Composition of Gases

Definition • Air pollution : An atmospheric condition in which certain substances (including normal constituents in excess) are present in concentrations which can cause undesirable effects on man and his environment. • They are in the form of gases (Nox, Sox, CO,VOC); Particulate matter(dust, smoke, fumes, etc) & Radioactive (rado-222, Iodine-131, etc)

Sources of Air Pollution

Classification of Air Pollutants • Air pollutants may be particulate or gaseous. On the basis of origin they are divided as • Primary pollutants ---- Are emitted directly from the point source. e.g. : CO, NO2, SO2 • Secondary pollutants ---- formed by interaction of primary pollutants e.g. : PAN, Smog, Ozone etc

Criteria of Pollutants

Indoor air pollution • Many people spend large portion of time indoors - as much as 80-90% of their lives. • We work, study, eat, drink and sleep in enclosed environments where air circulation may be restricted • Children, women more exposed to risk • Radon gas • Burning of dung cakes for fuel, wood, kerosene • Incomplete combustion produces CO • Cigarette smoke.

Effects of Air Pollution Air Pollution affects??? • Human health • Animals • Plants • Materials • Environment

Effect on Human health • Main problems are related to Respiratory Track - Asthma, hay fever, and other allergic diseases.  • Irritation of the eye, nose and throat. In severe cases there may be headaches, nausea, and loss of coordination. • Prolonged exposure can cause damage to the nervous system, digestive problems, and in some cases cause Lung cancer. • It lowers our resistance to colds and pneumonia. • CO has affinity towards Hb which cause disturbance in transportation of Oxygen, impairing our concentration, slow our reflexes, and make us confused and sleepy. • SO2 in the air leads to diseases of the lung and other lung disorders such as wheezing and shortness of breath. • Chronic respiratory disease, lung cancer, heart disease, and even damage to the brain, nerves, liver, or kidneys. • Effects of Arsenic, Asbestos, Mercury , Benzene etc.

Effect on Plants • Pollutants enter through stomata • Destroy chlorophyll and Affect photosynthesis • Cuticle( Wax Layer on Leaves) is lost • Necrosis – Damage to Leaf Structure • Chlorosis - Loss/ reduction of Chlorophyll • Abscission - Dropping of leaf • Epinasty – Downward curling of Leaf • DEATH

Effect on Animals and materials • Corrosion of metal surfaces, fading • SO2 & water form H2S – corrosion as well as disfigurement of statues made up of limestone or Marble • Air pollutants mix with rain water and increase acidity (Acid Rain) of water body and kill fish. • Ozone causes crackling of rubber

Effect on Environment • Visibility • Pollutants in the presence of sunlight produce photochemical Smog • Emission of Green House Gases tend to Global Warming • CFC’s cause Ozone Depletion

National Ambient Air Quality Standards

Annual Average : Annual Arithmetic Mean of minimum 104 measurements in a year taken twice a week 24-hourly at uniform interval • 24 Hours Average : 24-hourly/8-hourly values should be met 98% of the time in a year. However 2% of the time, it may exceeded but not two consecutive days. • 1. The levels of air quality necessary with an adequate margin of safety, to protect the public health, vegetation and property. • 2. Whenever and wherever two consecutives values exceeds the limit specified above for the respective category, it shall be considered adequate, reason to institute regular / continuous monitoring and further investigations. • HIGH VOLUME SAMPLER, GASEOUS SAMPLERS

Control Of Air Pollution • Proper air pollution control devices in industries • Using low sulphur coal • Regular engine tune up, replacement of old more polluting vehicles • Using mass transport system, bicycles etc • Shifting to less polluting fuels • Planting more trees • No to FIRE CRACKERS in Diwali and other occasions

Pollution Control Devices Cyclone Separator Bag House Filter

NATIONAL AIR QUALITY MONITORING PROGRAMME (NAMP) • Central Pollution Control Board is executing a nation-wide programme of ambient air quality monitoring known as National Air Quality Monitoring Programme (NAMP). • The network consists of three hundred and forty two (342) operating stations covering one hundred and twenty seven (127) cities/towns in twenty six (26) states and four (4) Union Territories of the country. • Under N.A.M.P., four air pollutants viz ., Sulphur Dioxide (SO2), Oxides of Nitrogen as NO2, Suspended Particulate Matter (SPM) and Respirable Suspended Particulate Matter (RSPM / PM10) have been identified for regular monitoring at all the locations. • The monitoring of meteorological parameters such as wind speed and wind direction, relative humidity (RH) and temperature were also integrated with the monitoring of air quality.

Water Pollution The Contamination of water with undesirable substances which make it unfit for usage is termed water Pollution.

Pollution Sources • Point sources are direct discharges to a single point; • examples include discharges from sewage treatment plants, injection wells and some industrial sources. • Non-point sources are diffused across a broad area and their contamination cannot be traced to a single discharge point. • Examples include runoff of excess fertilizers, herbicides, and insecticides from agricultural lands and residential areas; oil, grease, and toxic chemicals from urban runoff and energy production; and sediment from improperly managed construction sites, crop and forest lands, and eroding stream banks.

Surface Water Pollution • Sewage • Industrial effluents • Synthetic detergents • Agrochemicals • Oil • Waste heat

Domestic Sewage • Refers to waste water that is discarded from households. Also referred to as sanitary sewage, such water contains a wide variety of dissolved and suspended impurities. • It is large by volume and contains impurities such as organic materials and plant nutrients that tend to rot. • The main organic materials are food and vegetable waste, plant nutrient come from chemical soaps, washing powders, etc. • Domestic sewage is also very likely to contain disease-causing microbes.

Industrial Effluents • Waste water from manufacturing or chemical processes in industries • Industrial waste water usually contains specific and readily identifiable chemical compounds. • Mainly in the form of toxic wastes and organic pollutants. • Chromium, mercury, lead, copper, cadmium etc

Synthetic Detergents And Oils • Added because of washing clothes, cleaning utensils. • In industries for washing • Add surfactants and soaps to water • Toxic to fish, aquatic life. • Oceans are polluted by oil on a daily basis from oil spills, routine shipping, run-offs and dumping. • Oil spills make up about 12% of the oil that enters the ocean. The rest come from shipping travel, drains and dumping.

Agricultural Run Off • Routine applications of fertilizers and pesticides for agriculture and uncontrolled run off in water bodies. • Adds Nitrogen and Phosphorus to water • Causes Eutrophication and algal blooms. • Nitrate concentration is above the permissible level of 45 ppm in 11 states, covering 95 districts and 2 blocks of Delhi.

Ground Water Pollution • Is less comparatively as soil acts as a filter Still... • Septic tanks • Mining • Deep well injection • Presence of heavy metals in groundwater is found in 40 districts from 13 states, viz., Andhra Pradesh, Assam, Bihar, Haryana, Himachal Pradesh, Karnataka, Madhya Pradesh, Orissa, Punjab, Rajasthan, Tamil Nadu, Uttar Pradesh, West Bengal, and five blocks of Delhi. • Arsenic , Nitrate, Fluoride

Fluoride Poisoning • The incidence of fluoride above permissible levels of 1.5ppm occur in 14 Indian states, namely: • Andhra Pradesh, Bihar, Gujarat, Haryana, Karnataka, Kerala, Madhya Pradesh, Maharashtra, • Orissa, Punjab, Rajasthan, Tamil Nadu, Uttar Pradesh and West Bengal affecting a total of 69districts, according to some estimates. • Some other estimates find that 65 per cent of India’s villages are exposed to fluoride risk.

Fluoride Poisoning • A recent survey by the International Water Management Institute (IWMI) in north Gujarat showed 42 per cent of the people covered in the sample survey (28,425) were affected; while 25.7 per cent were affected by dental fluorosis, 6.2 per cent were affected by muscular skeletal fluorosis and 10 per cent by both. • Fluoride had been reported to cause depressions in DNA and RNA synthesis in cultured cells. • Another study on the effects of fluorides in mice showed significant reductions in DNA and RNA levels. • Conditions including ageing, cancer, and arteriosclerosis are associated with DNA damage and its disrepair.

Arsenic Poisoning • High levels of arsenic above the permissible levels of 50 parts per billion (ppb) are found in the alluvial plains of Ganges covering six districts of West Bengal. • Arsenic contamination of drinking water causes a disease called arsenicosis, for which there is no effective treatment. • Arsenic contamination is by far the biggest mass poisoning case in the world putting 20 million people from West Bengal and Bangladesh at risk though some other estimates put the figure at 36 million people.

Effects • Depletion of dissolved oxygen • Eutrophication • Pathogen….spreading diseases • Bio-magnification • Genetic deformities • Blue baby Syndrome • Minamata disease • Itai-Itai

DEPLETION OF OXYGEN • Low DO and High • Chemical Oxygen Demand (COD) • Biochemical Oxygen Demand (BOD) • Biodegradable and organic waste leads to Oxygen depletion • DO levels less than 4 mg / l disastrous. • Polluted waters have 0 DO

Pathogen Spread • Stagnant water and other untreated water provide a habitat for the mosquito and a host of other parasites and insects that cause a large number of diseases especially in the tropical regions. • Among these, malaria is undoubtedly the most widely distributed and causes most damage to human health.

Biomagnification

Pesticides. The organophosphates and the carbonates present in pesticides affect and damage the nervous system and can cause cancer. • Some of the pesticides contain carcinogens that exceed recommended levels. They contain chlorides that cause reproductive and endocrinal damage. • Lead. Lead is hazardous to health as it accumulates in the body and affects the central nervous system. Children and pregnant women are most at risk. • Petrochemicals. Benzene and other petrochemicals can cause cancer even at low exposure levels. • Chlorinated solvents. These are linked to reproduction disorders and to some cancers. • Other heavy metals. –Heavy metals cause damage to the nervous system and the kidney, and other metabolic disruptions.

Case Study of Vultures • Veterinary use of the drug diclofenac—used in the treatment of livestock—has been linked to the collapse of vulture populations throughout South Asia. • Vultures are keystone species that perform a vital ecosystem service by disposing of carrion and their decline has had dramatic ecological and socio-economic consequences. • Vultures feeding on the carcasses of animals recently treated with the drug suffer renal failure and die.

Blue Baby Syndrome • Blue Baby Syndrome or Methemoglobinemia is caused by decreased ability of blood to carry oxygen, resulting in oxygen deficiency in different body parts. • Infants are more susceptible than adults. • The disease can be caused by intake of water and vegetables high in nitrate, exposure to chemicals containing nitrate, or can even be hereditary. • As different parts of the body get deprived of oxygen, clinical symptoms of oxygen starvation start to appear, the main being cyanosis (derived from ‘cyano’, meaning dark blue; from Greek, kyanos). • The lips or even the skin start to take on a blue colouration, hence the common name, the blue baby syndrome/ disease.

Minamata Disease • First detected in 1956 • In Minamata, Japan, mercury was used in the industrial production of acetaldehyde. • Discharged into the nearby bay and was ingested by organisms. • Fish and other creatures in the sea were soon contaminated and eventually residents of this area who consumed the fish suffered from MeHg (methyl mercury) intoxication

ITAI-ITAI • Itai-itai disease ("ouch ouch sickness"), • Was the documented case of mass cadmium poisoning in Toyama Prefecture, Japan, starting around 1912. • The cadmium poisoning caused softening of the bones and kidney failure. The disease is named for the severe pains (Japanese:itai) caused in the joints and spine. • The cadmium was released into rivers by mining companies. This Cadmium contaminated water was used to irrigate rice fields.

Control of Water Pollution • Treatment of water before leaving in water bodies. • Restoration of polluted water bodies. • Ganga Action Plan • River Water Monitoring

Marine Pollution • Marine Pollution is caused due to Sewage Sludge, Indutrial Effluents, Detergents, solid waste, plastic, etc. • Sources : • River- Bring pollutants from drainage basins • Catchment Area- Human Settlements • Oil Drilling & Shipment • Effects : • Fishes show mortality • Oil disrupts the insulating capacity of feathers • Due to loss of Buoyancy and subsequent drowning of Birds cause Deaths

Control measures • Effluents should not be discharged • Treatment before discharge • Strict law enforcement- regarding drilling in Ecosensitive zones, dumping of toxic & Hazardous wastes • Minimum developmental activities on shore • CRZs: Coastal regulation Zones

GlobalEnvironmental Monitoring Stations/ Monitoring of Indian National Aquatic Resource • CPCB in collaboration with concerned SPCBs/PCCs established a nationwide network of water quality monitoring comprising 2500 stations in 28 States and 6 Union Territories. • The monitoring is done on monthly or quarterly basis in surface waters and on half yearly basis in case of ground water. • The monitoring network covers 445 Rivers, 154 Lakes, 12 Tanks, 78 Ponds, 41 Creeks/Seawater, 25 Canals, 45 Drains, 10 Water Treatment Plant (Raw Water) and 807 Wells. • Among the 2500 stations, 1275 are on rivers, 190 on lakes, 45 on drains, 41 on canals, 12 on tanks, 41 on  creeks/seawater, 79 on ponds, 10 Water Treatment Plant (Raw Water) and 807 are groundwater stations • Water samples are being analysed for 28 parameters consisting of 9 core parameters, 19 other physico-chemical and bacteriological parameters apart from the field observations. Besides this, 9 trace metals and 15 pesticides are also analysed in selected samples. • Biomonitoring is also carried out on specific locations.

Thermal Pollution • Definition : Presence of waste heat in the water which can cause undesirable changes in natural environment. • Causes: • Heat producing Industries • Power plants utilize only 1/3rd energy produced by fossil fuel rest is wasted as heat • Cold water is taken from water body for cooling ….used and left in the water body….back with increase of 10-15 Deg.

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ENVIRONMENTAL POLLUTION. By Mrs. Vaibhavi Apte. Definition of Pollution. When Harmful Substances Contaminate the environment it is Called Pollution.

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essay of environmental pollution

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Environmental Pollution Essay

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Environmental Protection

Environmental protection presentation, premium google slides theme, powerpoint template, and canva presentation template.

This visually stimulating template on environmental protection, compatible with Google Slides and PowerPoint, adopts a naturally gentle, cream color scheme, accented by vibrant, illustrative symbols that encapsulate the spirit of Mother Nature herself. Ready to be fully customized to best suit your needs, this presentation template delivers bits of ready content on topics like circular economy, recycling and individual contributions to environmental protection. Share facts and inspire discussion to pave the way towards a more sustainable future!

Features of this template

• 100% editable and easy to modify
• 35 different slides to impress your audience
• Contains easy-to-edit graphics such as graphs, maps, tables, timelines and mockups
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• Designed to be used in Google Slides, Canva, and Microsoft PowerPoint
• 16:9 widescreen format suitable for all types of screens
• Includes information about fonts, colors, and credits of the resources used

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