Decades after its rise, heavy metal has found its place in mainstream music, but it didn’t come without a fight.

Since its inception as a cult phenomenon in the ’60s and ’70s, heavy metal has become a genre of music that has gained a massive fanbase worldwide. Fans were instantly drawn to its aggressive sounds ...

Electricity and transportation each contribute about a quarter of America’s carbon emissions. Thanks to the growth of renewable energy and electric cars, those sectors are starting to get cleaner.