Daily Mail: Global temperatures could be brought back to pre-industrial levels by blasting trillions of lenses into space, astronomers claim. The team, from the University of Arizona, plans to fire the lenses a million miles above Earth to form a 100,000 square mile ‘sun shade’ that diverts the sun’s rays. The huge Space Sunshield would be 62,000 miles long and have a height roughly equal to Earth’s diameter – 8,000 miles. It would protect the Earth from 1.8 per cent of the sun’s …