2010-2019 water rates data from 30 major U.S. cities. The interactive graphs show average monthly residential water prices for three levels of consumption and the annual percent change Circle of ...

Here's the story of income inequality in America over the past 40 years. Hover over each line to identify household income, and click through to see the percentage growth over the past 40 years ...

President Obama's election night reference to global warming kindled a bit of hope among liberals that his administration might make a concerted effort to tackle this issue in its second term.

Beijing says it wants to cap its total consumption at about 3.9 billion tons by 2015, though some analysts expect it to reach around 4.2 billion -- a 27 percent leap from where it is today.