Answer: Varying frequencies. That’s how we can see different colors, as well as the presence of UV rays, gamma rays, etc. They’re all different frequencies of electromagnetic radiation
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It is not possible to answer because there is no Conversation. Or the answer would be none because of the same reason.
Answer: People cut down about 15 billion trees every year, some of them to make paper. Save your sheets by using the back, buying recycled paper, and asking your teacher to sometimes switch from printed homework to online assignments.
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