Russia is targeting Ukrainian cities and civilian infrastructure with Iranian-made loitering munitions. Are these weapons effective in shaping the war? 

Scientists say the rain forest is approaching a critical tipping point at which the damage is irreversible.

It’s been almost a year since the first COVID-19 vaccines were approved, and half of the world is at least partly vaccinated. Now, the emergence of the omicron variant is underscoring the risks of un…

The Biden administration has unveiled plans to dramatically ramp up the nation’s offshore wind industry to help fulfill U.S. climate pledges. How realistic is the roadmap?

During COP26, some countries pledged to stop using coal, a leading source of greenhouse gas emissions. But China, India, and some others remain reliant on coal.