WASHINGTON (AP) -- Harmful effects from global warming already are happening and are worsening, warns the first climate report from Barack Obama's presidency in the strongest language on climate change ever to come out of the White House. Global warming already has caused more heavy downpours, rising temperature and sea levels, rapidly retreating glaciers, longer growing seasons and altered river flow, according to the document released Tuesday by the White House science adviser and other top officials.
...
The "major disruptions" already taking place will increase as warming continues, the authors wrote. They project the average U.S. temperature could rise by as much as 11 degrees Fahrenheit (24 C) by the end of the century.
...
The report emphasized that water, either too much or too little, will continue to be a major problem in every region of the country.