Tara Lohan

After centuries of dam building, a nationwide movement to dismantle these aging barriers is showing how free-flowing rivers can restore ecosystems, improve safety, and reconnect people with nature.

Dam removals aren’t a climate cure-all, but the magnitude of the crisis we face will require all the tools we can muster — and master. Several decades of dam removals across the U.S. has proved they work to restore rivers better and faster than anything else. Now let’s put them to use for climate action, too.

The threat of invasive species is only one of the mounting pressures facing Antarctic wildlife, including warming waters, melting sea ice, ocean acidification and pollution. But broad conservation actions, like increasing marine protected areas, could help on all fronts.

American Prairie, working with the Charles M. Russell National Wildlife Refuge, can serve as a place where the American public can visit a landscape of an endless sky and wildlife with no fences, the likes of which you won’t see unless you go to the African Serengeti now.

A new book from water expert Peter Gleick urges a rethinking of how we use, manage and value one of our most important resources.

Kelp forests are one of the “most widespread and valuable marine ecosystems on the planet,” according to a United Nations Environment Programme report released in April.