The bar chat shows the percentage of people awareness about global warming.

As is illustrated by the graph, over three-quarter Americans who say they trust climate scientists as a source of information about global warming.

From the graph it is clear that only 1% carbon dioxide of all carbon dioxide that is emitted by man made sources.

As can be seen from the graph, 70% Americans who believe global warming is very real.

As is shown by the graph, only 12% Americans who believe global warming is not happening.

As is illustrated by the graph, more than 50% Americans who believe global warming is caused mostly by human activity.