Menu Close

Articles on Rivers

Displaying 1 - 20 of 120 articles

Mannus Creek in NSW during the 2020 bushfire period. Luke Pearce

Before and after: see how bushfire and rain turned the Macquarie perch’s home to sludge

When the post-bushfire rains finally arrived, the situation for many fish species went from dangerous to catastrophic. A slurry of ash and mud washed into waterways, sending oxygen levels plummeting.
Situated on a plateau and surrounded by mountains, Mexico City – seen here in a haze on May 20, 2018 – is a ‘bowl’ that traps smog and dust. AP Photo/Marco Ugarte

Mexico City buried its rivers to prevent disease and unwittingly created a dry, polluted city where COVID-19 now thrives

The Aztecs had a shining city on a lake, with canals, causeways and aqueducts – until the Spanish came. Mexico City is still suffering the consequences of their bad public health decisions.
Maine’s Penobscot River flows freely where the Veazie Dam once stood. Dam removals have reopened the river to 12 native fish species. Gregory Rec/Portland Portland Press Herald via Getty Images

When dams cause more problems than they solve, removing them can pay off for people and nature

Thousands of dams across the US are aging and overdue for maintenance. Taking them down can revive rivers, restore fish runs and create new opportunities for tourism and outdoor activities.
The January 2019 collapse of a dam in Brumadinho, Brazil, sent mining tailings and mud over the landscape for miles, destroying this bridge and killing 300 people. Andre Penner/AP

Mine waste dams threaten the environment, even when they don’t fail

Dams built to hold enormous quantities of toxic mining waste have a long history of spills. Decisions in the Pacific Northwest threaten three free-flowing rivers there.

Top contributors

More