Carbon dioxide levels in atmosphere surpass key milestone

Climate scientists say it's "like watching a train barrel down the track towards you in slow motion. It’s terrifying."

No cancer hazards found at NJ high school: Officials

New Jersey officials say there was no trace of radiological contaminants found around Colonia High School, following allegations that such hazards may have led to diagnoses of brain tumors and cancer in former students and staff.

Hotter nights due to climate change will cost us sleep, study suggests

By the year 2099, hotter “suboptimal temperatures” may reduce sleep by 50 to 58 hours per person each year, according to a new study of adults from around the world.

Laguna Niguel fire: 'Coastal Fire' torches homes, all evacuations lifted

A massive fire, called the "Coastal Fire," engulfed more than a dozen multimillion-dollar mansions near the Laguna Hills area in Orange County.

Cleaner air leads to more hurricanes in the Atlantic, study finds

A new study links how many hurricanes form worldwide to air pollution levels. Wednesday's study from the National Oceanic and Atmospheric Administration says cleaner air in Europe and the United States is helping trigger a dramatic increase in the number of Atlantic hurricanes.

Tonga volcanic eruption forced hurricane-speed winds to space

When the Hunga-Tonga-Hunga-Ha'apai volcano erupted, it caused pressure disturbances that led to winds of up to 450 mph to reach space.

April CO2 levels were the highest in recorded human history, data shows

The first time Earth reached a record average for CO2 concentrations in the atmosphere was in 2015 and the levels continue to grow every year.