But collecting microwave radiation has one major drawback, as Esteban Illanes of the European Southern Observatory, explains. 'It is absorbed by water. An observatory at sea level would pick up nothing.
Roughly the same goes for Gliese 581d, which has a stronger presence in the habitable zone on its far side, but may not be hot enough for liquid water - opinion is not 'completely settled' on this matter.
Firstly, Gliese 581g is located at almost exactly the right distance from its red dwarf parent star (Gliese 581) in order to sustain liquid water, which is the only known criterion for organic formation.
Saudi Arabia has leased vast tracts of land in sub-Saharan Africa. They grow food abroad with water that African countries don’t have the infrastructure to exploit. This is cheaper than using their own water back home.
Saudi Arabia has leased vast tracts of land in sub-Saharan Africa. They grow food abroad with water that African countries don’t have the infrastructure to exploit. This is cheaper than using their own water back home.
Four-fifths of "fossil" water in Saudi Arabia, one of the most parched areas of the world, is gone. The country is now directing its massive wealth towards buying land and growing crops in other, more verdant nations.
Four-fifths of "fossil" water in Saudi Arabia, one of the most parched areas of the world, is gone. The country is now directing its massive wealth towards buying land and growing crops in other, more verdant nations.
In 2011, 9.5 million Kenyans were affected by severe drought. Few people dreamt that two years later enough water to supply the entire country for seventy years would be discovered beneath the sun-scorched, cracked earth.