Even before the border wall is built, local business owners and conservationists worry about its impact on tourism and wildlife.

It took a decade of hard work, but one of the world’s most important wildlife corridors is now emerging from the fragmented forests of coastal Brazil.

Chemicals collect in microplastics, which then get eaten by fish, birds and seals — and by humans.

Demand for organic food is growing, but corporations are pushing back to keep consumers in the dark about what they’re eating, says food campaigner Stacy Malkan.

Eco-books coming out this month cover some of the most important topics on the planet — and give you some tools to help.

In many Mexican cities, water is treated as a political bargaining chip – a favor that public officials can trade for votes, bribes or power.

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

Farmers don't like living near big predators like leopards, but new research shows the carnivores provide a vital ecological service.

Water managers say no, but Native American tribes are keeping careful watch on the “water that connects us.”

Dozens of these water-filtering species are at risk of vanishing, and that’s bad news for every living creature that relies on them.