1.Global warming
2.The ozone hole
3.Cutting down the rainforests (deforestation)
4.Acid rain
5.Natural disasters
6.What can we do?
7.My environmental behaviour
8.Problems in my town
9.Problems of today (poverty, wars, diseases)

"Global problems

The environment is everything around us including people, water, fauna and flora.
The biggest problems that concern the environment are global warming, the hole in the ozone layer, cutting down the rainforests, acid rain and others.

Global warming
Global warming is caused by the greenhouse effect. Normally, heat from the sun warms the earth and then escapes back to the space. But carbon dioxide and other gases in the atmosphere trap the sun's heat, and thus slowly makes the earth warming.
Increasing temperature may cause floods in some parts of the world and drought in the others. Also ice and glaciers at the North and South Poles begins to melt and because of it sea levels rise.
The solution is to change the way we produce energy and produce less carbon dioxide.

The ozone hole
The atmosphere is thin layer of gasses that covers the surface of the Earth. One layer is
formed by a gas called ozone, which absorbs harmful ultraviolet (UV) radiation that comes
from the Sun. Scientists discovered that the ozone layer over the Antarctic was missing and in some populated places such as Australia it gets thinner and thinner. The reason is that we release ozone damaging chemicals in industrial and domestic activities. Some of them destroy the ozone molecule and UV reaches the Earth´s surface.
The UV causes damage to the DNA of cells and various cancers.
To prevent thinning of the ozone layer people shouldn´t use dangerous chemicals in aerosols, refrigerators and car air conditioning."

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