Tropical Storm Humberto expected to strengthen into major hurricane. Will Florida be impacted? That's hard to predict. Here's why.

"Particulate matter (PM2.5) levels are expected to be unhealthy in many areas. When air quality is unhealthy, everyone should ...

Deadly storm nears Vietnam after wreaking havoc in southern China, Hong Kong and Taiwan - Ragasa weakens to a tropical storm ...

World leaders and diplomats are tackling artificial intelligence at the United Nations' annual high-level meeting.

Humans are gambling the very stability of Earth's life support systems, scientists said Wednesday, warning that ocean acidity was yet another key planetary threshold to be breached.