3 years ago

How have co2 levels changed since 1870

Biology

1 answer:

STALIN [3.7K]3 years ago

6 0

Answer:

raised atmospheric concentrations of CO2 by 47% above pre-industrial levels

Explanation:

Over the past 170 years, human activities have raised atmospheric concentrations of CO2 by 47% above pre-industrial levels found in 1850. This is more than what had happened naturally over a 20,000 year period (from the Last Glacial Maximum to 1850, from 185 ppm to 280 ppm).

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