The Colorado is the nation’s most endangered river, according to the annual listing by American Rivers. 

For the second year in a row, Utah declares a drought emergency. 

On Earth Day, President Joe Biden signs an executive order protecting old-growth forests and recognizing their role in fighting climate change. 

The University of California, Davis, removes John Muir’s name from its John Muir Institute of the Environment.

Hawai'i will require sellers of oceanfront property to disclose whether it lies within a “sea-level-rise exposure area.”

Climate-change-fueled wildfires are causing US carbon monoxide levels to spike and are inhibiting the ability of the atmosphere to clean itself.

Reversing a Trump administration move, the Biden administration will once again require that the climate impacts of projects evaluated by the National Environmental Policy Act be considered. 

The Department of Energy offers $6 billion in funding to help cash-strapped US nuclear power plants stay open. 

Under federal court order, the Interior Department resumes oil and gas leasing on public lands, but substantially increases the royalty rate.

Denmark says it will temporarily increase production from its gas field in the North Sea to provide Europe with an alternative to buying from Russia, but still plans to halt all oil and gas production by 2050.

Cape Air, one of the nation’s largest commuter airlines, agrees to buy 75 nine-seater electric airplanes from Arlington, Virginia–based Eviation Aircraft. 

The Cherokee Nation reaches an agreement with the National Park Service under which tribal members will be able to collect 76 varieties of plants at Buffalo National River in Arkansas.

Texas governor Greg Abbott’s “enhanced safety inspections” of trucks crossing over from Mexico led to the waste of $240 million worth of fruit and vegetables and increases in food prices. 

Michael Van Nostrand, a Florida wildlife trafficker known as “the Lizard King,” is sentenced to seven months in prison for smuggling wild Florida turtles to collectors abroad.  

China plans to install 140 gigawatts of new solar and wind capacity in 2022, a record.  

Utility-scale solar installations in Florida are reducing critical habitat for endangered panthers.  

On the afternoon of April 3, electricity generated from renewable sources made up 97.6 percent of the California grid power, a new record. 

Anthropologist Gregory Forth says that 30 inhabitants of the Indonesian island of Flores told him of their sightings of a diminutive hominin that match descriptions of Homo floresiensis, a species of hominin distinct from Homo sapiens that is otherwise only known from the fossil record.

Stanford researchers develop solar panels that can generate electricity at night. 

Based on data from northwest Greenland, Jupiter’s moon Europa may have shallow liquid water and is a prime candidate for extraterrestrial habitation.