For decades, the Arlington radio station has helped the U.S. military communicate with its submarine fleet. It's also one of Russia's top nuclear targets.
An expanded Trans Mountain oil pipeline could carry 890,000 barrels of crude a day, more than the controversial Keystone XL and Dakota Access pipelines.
Doing the work to make old buildings more energy efficient isn’t as sexy as filling our roads with electric cars, but these smaller efforts are making a difference.