what causes global warming?

Answer 1

co2

Answer 2

The best answer: we don't know for certain.

Many scientists believe that so-called "greenhouse gases" are responsible. However, this has not been proven. Some theorize that it is a natural phenomena that is independent of so-called "greenhouse gases". There is not good agreement on which gases are responsible. Some theorize that it is an increase in solar output (although I believe this theory has been soundly defeated). There are likely many more reasonable theories that I have not heard.

The point here is, until a scientist finds out for certain, we shouldn't be running around like a bunch of Chicken Little's screaming "The CO2 is causing it! The CO2 is causing it!" This leads to rash, expensive action which may have no effect, or even a detrimental effect, on the global warming trend.

Jim, http://www.life-after-harry-potter.com

Answer 3

I think some of these answers are seriously playing down the importance of global warming! James Lovelock was just in Rolling Stone discussing this topic, and he believes we're in a lot of trouble.

Now, Greenhouse gases are partly responsible, along with deforestation, the melting ice caps, and continued growth of humanity in general. Power Plants, Agriculture, Transportation, and loss of eco-diversity all add to the greenhouse gases in the atmosphere.

Answer 4

1. People who needlessly pollute by driving unneccessarily large and fuel-inefficient vehicles (e.g., Hummers and SUVs).

2. People who insist on driving everywhere instead of walking or riding a bike.

3. People living, breathing, and reproducing to create more people. The more people , the more CO2.

Answer 5

High levels of carbon dioxide; melting of glaciers; drying up of streams; depletion of forests/jungles; building of highways/towns; volcanoes; natural order of things (warming up of climates/cooling off).