If CO2 is the cause of Climate Change, why is it the source of life for most living things?

If CO2 is the cause of Climate Change, why is it the source of life for most living things?
We're the carbon they want to reduce
Somehow they never mention CO2 when they talk about war
We learned this in middle school but I guess it isn’t taught anymore since people believe the climate nonsense
Trees breathe carbon dioxide.
all about control and a money scam

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