These US cities have the worst air quality this year

More than 156 million Americans live among unhealthy levels of air pollution, an annual report from the American Lung Association found.

NYC air quality today: Live map as NJ wildfire smoke reaches Tri-State

Smoke from a NJ wildfire is pushing NYC air quality into the danger zone. Officials urge sensitive groups to limit outdoor activity during Thursday's air quality advisory.

Solar energy installations continue to grow in the United States

Solar energy installations continue to grow in the United States, as does residential solar power, according to a new report from the Solar Energy Industries Association (SEIA).

Trump hopes to boost coal industry with executive order

Trump signed executive orders hoping to boost the coal industry amid a surging demand for electricity in the U.S. Here’s a look at how coal energy stacks up.

NYC's new composting rules spark outrage from landlords

Landlords say the new law is unfair, arguing they can’t control tenant behavior but are still liable for violations.

Mystery solved as 'crazy gross rain' dirties cars across hundreds of miles

Reports of vehicles mysteriously coated in dirt ranged from St. Louis and Missouri, through Illinois and even as far away as Charleston, West Virginia.

You can eat these 5 invasive animals to help population control, US Fish & Wildlife Service says

An invasive species is an introduced non-native organism that begins to spread or expand its range from an original introduction and can possibly harm the environment, economy or human health.

From pests to plates: The U.S. Fish and Wildlife Service wants you to eat these invasive species

An invasive species is an introduced non-native organism that begins to spread or expand its range from an original introduction and can possibly harm the environment, economy or human health.

What to know about Trump's interests in Greenland, Panama Canal

Trump has made several suggestions this week of ways to redraw the map. Here’s what to know about his interest in Greenland, the Panama Canal, Canada and the “Gulf of America.”

Shrinking Colorado River will take a toll on the nation's food supply

The shelves and prices at your local grocery store could look a little different soon. The Colorado River, which provides water for about 15% of our country’s agriculture, is shrinking.

Jimmy Carter: The first ‘green’ president

Former President Jimmy Carter will be widely remembered as a champion of conservation, but perhaps fewer know just how much he did to preserve his home state of Georgia and beyond.

What to do with your Christmas tree after the holidays

As the glitter fades and the lights dim, it’s clear: the holidays are almost over. Time to savor what’s left—or at least tackle the leftovers.