Nature World: Climate change is already affecting Americans' health, aggravating asthma and allergies and killing more people through extreme heat and floods, according to a White House report released Friday.
"We have a moral obligation to leave our children a planet that's not irrevocably polluted or damaged," the report said, adding that in addition to kids, the elderly, those with chronic illnesses, and the poor are also particularly vulnerable to climate change's adverse health affects.
In the past...