eli5: why is co2 trapping more heat than it blocks

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Hello,
I am wondering why global warming is explained with heat bouncing back instead of going to space (that’s what I remember from school). However if that is the case should it not block alot or sunrays too?

Edit:
Just a clarification I am not a global warming denier, I just want to understand better.

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5 Answers

Anonymous 0 Comments

Most of the heat energy delivered to Earth from the Sun is in the form of visible (optical) light. Most of the heat energy the Earth radiates into space is in the form of infrared radiation. CO2 is transparent to visible light, but opaque to infrared radiation.

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