What’s the real environmental impact of a plastic straw compared to the 80 million people we add to our population every year?

The Bureau of Land Management has proposed a mass sterilization, euthanasia and “sale without limitation” of America’s wild mustangs.

This year’s theme is “end plastic pollution.” That misses the point made by Earth Day founder Gaylord Nelson.

Settler colonialism in Arizona is ongoing. It continues to harm both the planet and indigenous peoples.

A new book offers insight into how our public lands were created — and what that means as we fight to protect them today and in the future.

Growing palm oil for use in food is already destroying habitats and causing extinctions. Using it for biofuel will make things even worse.

A Republican bill threatens to open up federal wilderness areas to mountain biking — and in the process threatens the 1964 Wilderness Act.

We need all the tools we can get to address the environmental and economic inequality felt by many across the globe.

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.”

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