Actually, it is the building block of all life, since every carbon molecule in our bodies originated as CO2, processed into usable form by plants. (But I think you know that.)
Recently, at a career fair at a local elementary school, I showed kids a CO2 molecule and told them that it is carbon dioxide, which plants eat. I didn't say a thing about the global warming nonsense.
The global warming zealots are all acting like vger. They want to meet their creator.
kIDS UNDERSTAND EATING!