Cause-And-Effect: Why Is The Globe Warming?

The human race has made many changes to the Earth's surface. There are ever so many more cows today than prior to the start of agriculture and animal husbandry, plus we are also burning prodigious amounts of fossil fuels. Released gases, such as methane and carbon dioxide, are effective at trapping the infrared radiation emitted by warm objects on the Earth's surface, further heating the surface of the Earth.

This.... and this:

...lead to this (Al Gore in "An Inconvenient Truth" explains observed temperature trends and CO2 levels)

...and this.