lunes, 29 de enero de 2007
The biggest environmental problem we face today is global warming. If we continue to burn gas, coal and oil, the atmosphere will contain more CO2, so the world will get warmer. If it gets warmer , sea-levels will rise and the climate will change.
Trees help to stop global warming because they change CO2 into O2. However, if we don't stop cutting down the rain forest, there will be more CO2 in the atmosphere and global warming won't get better. So we must preserve forests like the Amazon.
The holes in the ozone layer are another problem. The ozone layer proyects us from ultra-violet rays from the sun. If the holes get bigger, the ultra-violet rays will make the atmosphere hotter.
Gobal warming is getting worse every day. We won't solve this problem if we don't act now.
if you want to learn more about global warming enjoying youself I recommend this web site.