Harvard: Block the Sun Chemically to Curb Global Warming
Filling the lower stratosphere with sulfate could reflect sunlight - and slow down the planet's warming. According to Harvard researchers, it costs just over $ 20 billion a year to...
This is How Little Water Earth Has
If all the water is collected, it will only be a small drop compared to the globe. About 70 percent of the earth's surface is covered by water. But the...