it was the 50th anniversary of Earth Day, and it came as COVID-19 lockdowns have cleared air and water worldwide. Pollution in several major cities, including Paris and New Delhi, is about 50 ...
Water evaporates from ground level and rises into the atmosphere, spreading across the world as vapour before cooling, condensing and returning to the Earth as rain or snow. However, decades of ...
Winners have just been announced for Hackaday’s Earth Day Challenge ... into a river or stream to gauge the speed at which the water is moving. It uses a commodity plumbing flow volume sensor ...