In Oregon's high desert, a more than 10,000-year-old lake is drying up. That doesn't have to happen. Summer Lake hosts millions of migratory birds annually, but its water is being diverted to farms.
The U.S. Postal Service has big plans to replace its aging fleet of 165,000 gasoline-burning delivery vehicles. And some are pushing for the electric trucks to be built by union labor in Wisconsin.
Scientists are tracking a deadly bird flu outbreak that has infected wild birds in more than 30 states. Purging the nation's poultry supply may not be enough to keep the virus from sticking around.
While standard solar panels can provide electricity during the day, this device can be a "continuous renewable power source" during the day and at night.
The federal government has begun tallying the damage climate change could do to the economy and its budget. This comes as scientists warn time is running out to avoid catastrophic global warming.
In rural farming regions, dangerous chemicals from fertilizer have made their way into water sources. For some towns, it takes millions of dollars just to get clean water for a few hundred residents.
There's concern the U.S. push to send more natural gas to Europe will increase climate warming emissions. But energy experts say the crisis might actually speed up the shift to cleaner energy.