Toilets eject aerosol droplets that may carry disease-causing pathogens. Learning about how these particles move could help reduce exposure in public restrooms.
Thanks to humans, the concentration of planet-warming carbon dioxide in the atmosphere is now 50% higher than before the industrial era. These gases are raising Earth’s temperature.
Thanks to humans, the atmosphere has 50% more planet-warming carbon dioxide today than it did before the industrial era. Those gases will continue raising Earth’s temperature for years.
The CDC’s updated mask guidelines say that cloth masks offer the least protection from COVID-19. Differences in the materials masks are made from and the ways they fit are the reason.
Air-ventilation upgrades have been badly needed in U.S. classroooms since long before the pandemic. Low-tech filtration systems that cost about the same as a textbook per student can make a big difference.
Is it time to take drastic steps to modify Earth's climate to avoid catastrophic warming? A panel of experts says the idea deserves study.
How well your mask works depends on how well it fits. Wearing two snug masks made of different materials offers 95% protection from exposure to aerosols that could contain the coronavirus.
The new variant has been estimated to be 50% more transmissible. It's already been detected in at least 10 US states.
The new variant has been estimated to be 50% more transmissible. It's already been detected in at least 10 US states.
Experts weigh in on whether they will sit and eat at a restaurant.
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