Time to soak up the rays. Ukraine had been seeking investors for a solar project as it observed the 30th anniversary of the worst commercial nuclear disaster in history. Now two Chinese companies have announced plans to turn the site of the catastrophe into a massive 1-gigawatt solar farm. The Chernobyl Exclusion Zone, which covers 1,000 square miles around the abandoned reactor, still contains too much radiation to be used for agriculture or forestry. But the land is cheap, and there’s already electrical infrastructure in place to once again produce energy.