Runaway Greenhouse effect explained. Thats what happening on Venus and can happen on Earth.
To understand it more I give you an example, in Hot summer days when you open the door of a car park outside, it is hotter inside the car than outside. Why is it that? Sunlight has visible light and glass is transparent to it that’s why we can see both ways in & out. But sunlight has Ultra Violet light also.
So Uv when passing thru the glass of car losses its energy & becomes longer wavelength i.e Infrared which than trapped inside the car and makes it hotter than outside. The Same effect is happening in Venus that Uv light trapped as Infrared in the atmosphere. That’s why people on earth should be worried about climate changes and global warming on earth as because of pollution, factories, vehicles on road our atmosphere is also becoming polluted and heavier.