The Null Device
First there was global warming, and now we have global dimming
, where the amount of sunlight reaching the earth's surface has been diminishing. Scientists aren't sure of the cause (and some dispute the existence of this phenomenon), but a leading explanation is pollution particles in the atmosphere. This could have far-reaching effects, from nobbling solar power to causing massive ecosystem collapse by affecting photosynthesis. However, the decline does not affect ultraviolet radiation, so you can still get skin cancer as you scrabble around in the dark.
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