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People have no choice but to breathe the air around them. When it is polluted, they breathe inozone, particles and harmful gases that can hurt their lungs, heart, and overall health. Air pollution can cause coughing, burning eyes, and breathing problems. Fortunately, people usually start to feel better as soon as the air quality improves, but not always.
63 people died in Belgium in 1930, 20 people died in Pennsylvania in 1948, and more than 4,000 died in London in 1952 as a result of severe air pollution. Breathing small amounts of air pollution over many years is also considered dangerous. It may even contribute to life-threatening diseases such as cancer.
The elderly, the young, and those with cardiopulmonary disease, such as asthma or severe bronchitis, are the most vulnerable to air pollution exposure. Children are at greater risk because their lungs are still growing. Also, they play outside and are active. As a result, pound for pound they breathe more outdoor air pollution than most adults.
Although people have no choice but to breathe the air around them, they do have choices that can help them stay healthy. They can choose to stay indoors or be less active on poor air quality days. They can avoid high-traffic and highly industrialized areas whenever possible. They can also choose to support collective efforts and take individual steps that reduce air pollution. Such actions are a positive response to a problem that can literally steal one’s breath away.
2010-03-13 13:18:24 補充:
Air pollution changes our planet’s climate, but not all types of air pollution have the same effect. There are many different types of air pollution. Some types cause global warming to speed up. Others cause global warming to slow down by creating a temporary cooling effect for a few days or weeks.
2010-03-13 13:19:12 補充:
Read on the learn more about the pollution that causes Earth to warm and the pollution that causes Earth to cool.
Some air pollutants cause more global warming
Air pollution includes greenhouses gases. One of these is carbon dioxide, a common part of the exhaust from cars and trucks.
2010-03-13 13:20:07 補充:
Greenhouse gases cause global warming by trapping heat from the Sun in the Earth’s atmosphere. Greenhouse gases are a natural part of Earth’s atmosphere, but in the last 150 years or so, the amount in our atmosphere has increased.
2010-03-13 13:22:06 補充:
Air pollution changes our planet’s climate, but not all types of air pollution have the The increase comes from car exhaust and pollutants released from smokestacks at factories and power plants.
2010-03-13 13:22:43 補充:
The increase in greenhouses gases is the cause of most of the global warming that happened over the past century. Scientists predict that much more warming will likely happen during the next century.
Some air pollutants cause temporary global cooling
2010-03-13 13:23:21 補充:
Cars, trucks, and smokestacks also release tiny particles into the atmosphere. These tiny particles are called aerosols. They can be made of different things such as mineral dust, sulfates, sea salt, or carbon.
2010-03-13 13:24:01 補充:
Some of these tiny particles block a little bit of the Sun’s energy from getting to Earth. Some of these particles get into the atmosphere naturally.
2010-03-13 13:24:30 補充:
They are dust lifted into the atmosphere from deserts, from evaporating droplets from the ocean, released by the smoke from wildfires, and erupting volcanoes. But air pollution released by humans by burning of fossil fuels also adds them to the atmosphere.
2010-03-13 13:24:43 補充:
Greenhouse gases stay in the atmosphere for years and cause warming around the world. Computer models indicate that, worldwide, the tiny aerosols cause about half as much cooling as greenhouse gases cause warming.