Earth has played a version of this game with blocks of carbon

To understand climate change,think of the game Tetris.For eons, Earth has played a version of this game with blocks of carbon.They enter the atmosphere as carbon dioxide gas from volcanoes,decaying plant matter,breathing creatures and the surface of the sea.And they leave the atmosphere when they're used by plants during photosynthesis,absorbed back into the ocean,or stored in soil and sediment.This game of Tetris is called the carbon cycle,and it's the engine of life on Earth.