Faced with the potential of a large expense related to water quality, Maine's Portland Water District had two investment choices: conservation or concrete.
The Boston Marathon takes place every year on the third Monday in April. The average daytime high temperature in April has been warming rapidly in recent decades, making uncomfortable race days more likely.
From protecting our waterways to reducing overfishing, we've made a lot of progress since the first Earth Day. Take a look at five big wins in the 46 years since 1970.
A not so rainy season: Drought in southern Africa in January 2016
February 17, 2016
With this year's ongoing El Niño event, parts of East Africa may be ripe for a potential outbreak of Rift Valley Fever. See how government agencies are using climate data to help predict, and hopefully prevent, an outbreak of this deadly mosquito-borne virus that affects both people and valuable livestock.
Late July’s stupefying heat indexes in southwest Iran
August 14, 2015
Of all the potential impacts of global warming, increases in extreme heat are the most certain. Yet it's the one extreme U.S. communities have paid the least attention to so far. Ladd Keith hopes to change that.
Excessive rainfall enabled a mosquito population boom in Arizona, increasing the opportunities for the virus to spread from birds to people.