Armed with modern data, a team of scientists has revisited the Cadillac Desert and found the Southwest's water woes are as bad as ever.
Glen MacDonald, of UCLA, talks about the threat of drought in the Southwest and what it means for water supply.
NASA scientist Michael Watkins explains how satellites are used to monitor our changing global groundwater supplies.
The atmosphere isn't the only place carbon dioxide caused by human activity goes.
Craig Matthews, long-time fly-fishing guide, gives an eyewitness account of the changes he's seen in over thirty-plus years on the rivers around West Yellowstone, Montana.
Gordon Rogers, River Keeper of Georgia's Little Satilla River, shows us the impacts he sees in a precious ecosystem along Georgia's coast.
Coal generates carbon dioxide when combusted, which is causing the world to warm. In Georgia, a state that gets over 60 percent of its electricity from coal, some coastal residents are connecting the dots between coal and changes in the local ecology and economy attributed to global warming.