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I'm not sure if you mean sunlight, or just a general question about light.

if you mean sunlight.. then, I would say no sunlight would have a clearly negative effect on life on earth. No sunlight = no plants = no plant eating animals = no food for humans = everyone dies.


If it's just a general question of light, (as if you were in a closet with no light), then the only negative impact would be you couldn't see light reflected off objects.

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15y ago

What else can I help you with?