We mapped out where the drilling could take place — and how it overlaps with the critical habitats of the most sensitive species at risk.

BP’s mistakes, rooted in regulator failures, revealed “such systematic failures in risk management that they place in doubt the safety culture of the entire industry.”

2017 was another deadly year for panthers. How many more years can this critically endangered species survive?

Drilling in the refuge was tucked into in last month’s Republican tax bill, defying decades of attempts to protect this pristine wildnerness.

Drawing clear borders around the Arctic Ocean matters for the future of the people who live there — and for the planet as a whole.

New rules could affect everything from clean power to migratory birds, and they’re just a hint of what’s yet to come.

Stories about Bears Ears, sharks, vaquitas, an extinct bat and the Endangered Species Act resonated with our readers this year.

The year of Trump brought challenges, but it also inspired us to seek the truth and find solutions.

Air pollution is an unevenly distributed issue — how it affects you depends on where you live.

The National Butterfly Center just filed suit to block Trump’s border wall from being built on its property in Texas.