The cost of solar energy is plummeting. But it's still way more expensive than coal and natural gas Optimism surrounding a solar energy boom seems to be hitting new highs: Game-changing technologies seem to hit the market nearly every week, and new government policies, like a series of solar mandates in Japan, has people and businesses all over the world installing solar panels at record rates. Nonetheless, several challenges stand between us and a true solar revolution. Here are three: Cost The cost of solar is down to just 10 percent of what it was five years ago. But for solar to be viable without government subsidies...
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