Climate Facts (5)

What is the current CO₂ level in the atmosphere, and has it ever been higher in Earth’s history?

What is the optimum level of CO₂ (ppm) for plants? Plants do love CO₂ up to a point – CO₂ is the raw material for photosynthesis (plant “food”). There isn’t one single “optimum” CO₂ level for all plants, but experiments show that many plant

When and where was CO₂ first measured?

What percentage of the atmosphere is CO₂, and what percentage of it is man-made?

Carbon stored via planting tree