The city is racing to put up 277 sensors. Once installed, Chicago will have the most high-quality air monitors in the country ...

The UN eyes further negotiations, but global discord on limiting an escalating crisis makes next steps unclear.

The Trump administration delayed releasing reports on countries’ human rights records. Now they’re out, and they’re starkly ...

An acceleration of warming that started in 2023 continued through 2024, according to the latest annual climate assessment by ...