No they are not "far" with a fusion reactor, the best projections put it at 50-70 years from now. Never mind the trillions of dollars it would cost.
Its no better than waiting for Carbon Sequestration and other so-called 'Clean Coal' technologies.
Unknown unproven uncertain.
And while twiddling your thumbs waiting to do nothing, there actions that can be taken right now today: Nuclear Power, low emission fossil fuels like Natural Gas, Public Transportation, etc.
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This is how it will all end: not with floods, earthquakes, falling comets or gigantic crabs roaming the Earth. No, doomsday will start simply out of indifference.
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