From Yahoo! Answers:
ive got a few questions about global warming:
1.How is man perpetuating (making it worse) the problem?
Man is making the problem worse by sending greenhouse gases into the atmosphere by burning fossil fuels. Greenhouse gases, like carbon dioxide, cause the greenhouse effect. The greenhouse effect makes sure the Earth is warm enough for humans to live by trapping radiation and heat inside of the Earth's atmosphere. (This is a very simplified way of thinking about it.)
2.What can man do to stop or slow down the problem of global warming?
To slow global warming, we have to stop the extra release of greenhouse gases. To do that, we have to stop burning fossil fuels like oil, coal or natural gas. In other words, we have to switch to renewable energy sources.
3. Highlight the social and enviromental impacts of global warming?
No matter what we do, global warming is going to have some effect on our climate (it is already). Some effects if we DON'T take action:
Ice caps are going to melt.
Sea levels are going to rise.
Species are going to go extinct.
Hurricanes are going to become more frequent and stronger.
Lakes are going to warm and become shallower.
Heatwaves will become more common and more powerful.
Rain patterns will change.
But if we do take action, the effects of these will be limited.