Hypothesis 2

I think it difficult and hard that the reflection of global warming gases for the Earth’s energy waves is larger than these gases block energy waves from outside the Earth. A sunny day without cloud is warmer than a cloudy day, and a cloudless night is cooler than a cloudy night, especially around dawn. These show that the cloud reflects the Earth’s energy waves and blocks sunlight. Do global warming gases have a polarization function that allows sunlight to pass through and block the earth’s energy waves?