Scientists have found that a common enzyme can speed up—by 500 times—the rate-limiting part of the chemical reaction that helps the Earth lock away, or sequester, carbon dioxide in the ocean.
When high ethanol prices pushed drivers in São Paulo, Brazil to switch to filling up with gasoline, the concentration of ultrafine particles less than 50 nanometers in diameter increased by one-third, research suggests.
As transportation networks expand and urban areas grow, noise from sources such as vehicle engines is spreading into remote places. Human-caused noise has consequences for wildlife, entire ecosystems and people. It reduces the ability to hear natural sounds, which can mean the difference between life and death for many animals, and degrade the calming effect that we feel when we spend time in wild places.
Earlier this month, an iceberg the size of Delaware broke off Antarctica’s Larsen C ice shelf and floated into the sea.
Researchers have found that the polluting effects of releasing treated wastewater from hydraulic fracturing (fracking) may last much longer than previously thought.