Mercury is released by environmental and human-driven processes. Some forms, specifically methylmercury, are toxic to humans.

Laughing gas (nitrous oxide or N₂O) is primarily released by the microorganisms responsible for cleaning our wastewater.

Hundreds of millions of years before oxygen surged in the atmosphere 2.4 billion years ago, swaths of oxygen winked in and out of existence in the ocean.

Reoxygenation approaches have shown some success in lakes, but their potential risks must be examined carefully before ...

Researchers are exploring whether artificial oxygenation could offer a lifeline to marine ecosystems on the brink ...

Coastal waters around the world are increasingly losing oxygen, with dramatic consequences for both ecosystems and the people ...

Could the artificial introduction of oxygen revitalise dying coastal waters? While oxygenation approaches have already been proven successful in lakes, their potential side effects must be carefully ...

Three people monitored their air quality in different locations for several months. This is what we discovered.