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1. China (30%)
The most populous country in the world has a huge export market, which has grown its industry to become a serious danger to the planet.

2. United States (15%)
It is the world's leading industrial and commercial power. Despite the fact that in recent times it has been leading the most important initiatives to combat climate change, in practice the vast majority have proved insufficient.

3. India (7%)
Fourteen of the fifteen most polluted cities in the world are, according to the World Health Organization, in India. The country has a law since 1981 that protects the air.

4. Russia (5%)
The largest country in the world appears in this ranking due to its high dependence on products such as oil, coal, gas and fossil fuels.

5. Japan (4%)
In last place comes the other great Asian power after China. Japan is the world's largest consumer of fossil fuels and the fifth largest emitter of greenhouse gases.

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What is air pollution? Learn how greenhouse gasses, smog, and toxic pollutants effect climate change, and human health

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Learn about Pollution | Environment Defilement | Cartoon

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Stopping pollution of all kinds is in the hands of each one of us. It is about modifying habits little by little to help reduce what we pollute. These are some tips:

Consume ecological products: for the production of ecological products the use of chemical elements that can harm the environment is avoided.

Recycle: we are usually clear about where to dispose of containers or glass, but in many other cases we do not know where to dispose of waste and the first rule of thumb to recycle is to separate.

Reduce the consumption of plastics: We use a lot of plastic and most of it is single use. The average wearing time of a plastic bag is estimated to be 10 minutes and it takes about 400 years to degrade.

Reduces the use of water and electricity: Water is a resource that can be depleted, so it is essential to take care of its use. In the case of electrical energy, it is essential to reduce use by opting for low-consumption appliances.

Avoid products packaged in plastic and go for those that are packaged in paper, cardboard or glass.

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5 Easy ways to reduce pollution for everyone.

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What are the major causes of pollution?
-  Pollution is produced by fumes from car exhaust pipes and factory chimneys, from burning garbage, from industrial dusts (cement, plaster, mineral concentrates, from forest fires and volcanic eruptions.

- Some causes are due to the dumping of solid domestic (non-hazardous waste) and industrial waste, oil spills and the discharge of used oils.

-  Radioactive pollution can be caused by an accident (such as the one at Chernobyl), by use, and by the deliberate disposal of radioactive waste.

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Air pollution happens when solid and liquid particles-called aerosols -and certain gases end up in our air. These particles and gases can be bad for the planet and for our health, so keeping track of them is important.

Where do aerosols come from?

Any particle that gets picked up into the air or is formed from chemical reactions in the air can be an aerosol. Many aerosols enter the atmosphere when we burn fossil fuels-such as coal and petroleum-and wood. These particles can come from many sources, including car exhaust, factories and even wildfires. Some of the particles and gases come directly from these sources, but others form through chemical reactions in the air.

Aerosols can come from other places, too, such as ash from an erupting volcano. Dust, pollen from plants and mold spores are also examples of aerosols.

What else causes air pollution?

Certain gases in the atmosphere can cause air pollution. For example, in cities, a gas called ozone is a major cause of air pollution. Ozone is also a greenhouse gas that can be both good and bad for our environment. It all depends where it is in Earth's atmosphere.

Ozone high up in our atmosphere is a good thing. It helps block harmful energy from the Sun, called radiation. But, when ozone is closer to the ground, it can be really bad for our health. Ground level ozone is created when sunlight reacts with certain chemicals that come from sources of burning fossil fuels, such as factories or car exhaust.

When particles in the air combine with ozone, they create smog. Smog is a type of air pollution that looks like smoky fog and makes it difficult to see.

How does air pollution affect Earth's climate?

Aerosols can impact how the Sun's light hits Earth. For example, some aerosols reflect sunlight while others absorb sunlight. It depends on the color of the particle.

Dark surfaces-whether it's a black t-shirt or a dark particle in the atmosphere-absorb the Sun's heat. Lighter-colored surfaces reflect heat from the Sun.

A white t-shirt reflects the Sun on a hot day, making you feel cooler. In the same way, light-colored particles that reflect the Sun's light and heat away from Earth can make the global temperature cooler. Dark-colored particles that absorb the Sun's light can make the global temperature warmer.

How does air pollution affect our health?

Breathing in polluted air can be very bad for our health. Long-term exposure to air pollution has been associated with diseases of the heart and lungs, cancers and other health problems. That's why it's important for us to monitor air pollution.

How is NASA monitoring air pollution?

NASA uses satellites orbiting Earth to keep an eye on air pollution. In fact, air quality forecasters use information about aerosols from NASA's Aqua, Terra and Suomi-NPP satellites.

NASA also is developing a new instrument called the Multi-Angle Imager for Aerosols, or MAIA, to fly aboard a future spacecraft mission. MAIA will help scientists understand the size, makeup and quantity of aerosols in our air. Eventually, scientists will be able to compare this information with health records. This can help us better understand the relationship between aerosol pollution and human health.

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Air pollution happens when solid and liquid particles-called aerosols -and certain gases end up in our air. These particles and gases can be bad for the planet and for our health, so keeping track of them is important. Any particle that gets picked up into the air or is formed from chemical reactions in the air can be an aerosol.

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1. Environmental pollution: consists of the release of chemical substances into the atmosphere, which alter its composition and pose a risk to the health of people and living beings.

2.  Water Pollution: : It exists with the presence of wastes in the water. Pollution in the seas, rivers and lakes has become a source of infections and diseases for humans.

3.  Chemical pollution: a certain chemical compound is introduced into the aforementioned media. Pollution can be found in materials essential for human life, such as water, land, food, air

4. Radioactive pollution: It refers to that derived from the dispersion of radioactive materials, such as enriched uranium, which is used in medical or research facilities, nuclear reactors of power plants, ammunition armored with metal alloyed with uranium, submarines, artificial satellites, etc.

5. Thermal contamination: It occurs due to the emission of fluids at high temperature and is caused by human influence.
Etc.

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What is pollution?
Pollution is the presence of any substance in air, water, soil, or food which threatens the health of human, animal and plant life.

Pollution, also called environmental pollution, the addition of any substance (solid, liquid, or gas) or any form of energy (such as heat, sound, or radioactivity) to the environment at a rate faster than it can be dispersed, diluted, decomposed, recycled, or stored in some harmless form.