The planet may be threatened by global warming, possibly caused by burning fossil fuels (petroleum, natural gas, and coal) that produces carbon dioxide (CO2). The following table lists the top 15 producers of CO2 and the annual amounts (million of metric tons) from fossil fuels. Graphically depict these figures.

Country CO2

Australia ...............417.7

Canada ...............541.0

China ................. 7706.8

Germany ...............765.6

Indian ................ 1591.1

Iran .................528.6

Italy ................407.9

Japan ................. 1098.0

Korea, South ..............528.1

Mexico .................443.6

Russia ................ 1556.7

Saudi Arabia ..............438.2

South Africa ..............451.2

United Kingdom ...........519.9

United States ............. 5424.5