The explosion happened after a man tried to light a stove in the home. The man, his girlfriend, and a child were all life-flighted to a burn center in Pittsburgh.
Bloomberg said they were looking for cities with ambitious - yet realistic - goals to address climate change. Pittsburgh wants to use 100% renewable energy by 2030.
From our podcast, Trump on Earth, we hear from New York Times reporter Eric Lipton about the deep ties between the Trump Administration, polluting industries and top agency officials.
