Keeling Curve
CO₂ concentration at Mauna Loa Observatory, Hawaii — the longest continuous atmospheric CO₂ record. The sawtooth is seasonal (Northern Hemisphere plants absorb CO₂ in summer, release in winter). The trend is us.
CO₂ concentration at Mauna Loa Observatory, Hawaii — the longest continuous atmospheric CO₂ record. The sawtooth is seasonal (Northern Hemisphere plants absorb CO₂ in summer, release in winter). The trend is us.