El Paso's drier than an cow bone baking in the Chihuahuan Desert, and an important source of water for drinking and farming has shrunk into a sandy puddle.
American cities could see many more hot-weather fatalities in the decades to come, as climate change drives longer and more frequent heat waves.
Heavy agriculture and global warming are aligning to produce nasty algae blooms in the Great Lakes, scientists say.
NASA scientists say Canadian winters are warming up -- a change that's "like Winnipeg, Manitoba, moving to Minneapolis-Saint Paul in only 30 years."
Scientists with the Megacities Carbon Project hope to pin down a slippery piece of climate science: measuring a city's carbon footprint.