This graphs shows percentage of awareness about   Global Warming.  The majority of  Americans believe global warning is very real but less people believe that global warning is not happening. Half of Americans believe Global Warming is caused mostly by human activities. The percent of scientist who believe global warming is being caused by human is dramatically highest percent which is 90.  Percent of all carbon dioxide emitted by man made sources is only one percent which is smallest among  all. More than half of Americans believe global warming is mostly caused by human activities. 76 % of Americans trust the scientists regarding information oh global warming which is comparatively high.