A 46-country survey by ACNielsen has shown that despite being the number one source of greenhouse gases that 13 percent of the American population have never heard of global warming.

Currently The USA comes first in greenhouse gas emissions ahead of China, Russia and India although the study also showed that Americans are the least concerned about global warming.

The survey also showed that countries affected by natural disasters seemed most concerned including Latin Americans and the Czech Republic which was hit by floods in 2002.