Evidence+of+Global+warming

The level of carbon dioxid in the Earth's atmosphere remained relatively stable until about 100 years ago. This was the time that the human race began burning fossil fuels at a high level. In just over a century, industrail civilization has added 360 billion tons of carbon dixide to our atmosphere. Carbon dioxide is very difficult to get rid of- the natural processes are very slow.

There is a correlation between the rise in CO2 levels and the rise in temperature over the years.

When energy reaches us from the sun, some is absorbed by the Earth and some is reflected by the Earth.

The amount of carbon dioxide in the atmosphere greatly affects how much energy that is reflected by the Earth.

The CO2 absorbs some of the reflected energy from the Earth and stops in leaving the atmosphere. In this way it acts like a greenhouse and the Earth starts to warm up.

Diagram?