Evidence that air cleaners stop germs is still lacking
A new scientific review has found that many of the air-cleaning and ventilation technologies being used to stop the spread of diseases like COVID-19 and flu have not been clearly proven to protect people in real life.
Satellite data provides new insights into city-level CO₂ emissions
In a new study, scientists have used satellite observations from NASA’s OCO-3 (Orbiting Carbon Observatory-3) to provide a ‘top-down’ view of CO₂ emissions in 54 major global cities.
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