changes to the atmosphere are creating four main sets of problems.
You may have heard about two of them:
are two quite separate phenomena caused, on the whole, by
The third - acid rain - is more regional, while the fourth,
VOCs and ozone, is much closer to home.
change will affect the whole world. In the last 100 years
various activities have increased the amounts of gases that
trap the heat of the earth.
About half of the global warming is due to carbon dioxide
(CO2). Burning fossil fuels (coal, oil, and gas) produces
As more forests are cleared and burnt, the earth loses its
"lungs", and therefore loses its capacity to absorb this gas