Global warming is a hot issue. Sometimes it is seen as a false alarm but most warns us that a temperature rise of just a few degrees could bring catastrophe. Extreme weather condition may become more frequent and some areas may become drier while other wetter. One thing is for sure, atmospheric level of carbon dioxide has been steadily rising this century. It's this and other man-made gases that together acts like a green house, trapping the heat of the sun. Power stations and automobiles are primarily to blame. They release these gases when they burn oil, coal or gas. In the long term, sea level may rise as higher temperature expand ocean waters. Low lying countries are particularly vulnerable. Government are trying to see how we can lessen our dependence on faster fuels.