The CO2 concentrations in the atmosphere are rising as we speak. The maximum possible value to avoid catastrophic climate change is 350ppm. We're already beyond the limit. Stop Talking About It, Do Something!
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Acetic
Acerbic, acidic, acidulous.
NOT TO BE CONFUSED WITH ascetic, meaning renunciate, or holy.
ALSO NOT TO BE CONFUSED with aesthetic: meaning beautiful or pleasing.
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