4. What are carbon dioxide levels now? How often in the past 650,000 years have they been that high?

Biology

1 answer:

fgiga [73]3 years ago

4 0

Answer:

Explanation:

Scientists at the Mauna Loa observatory in Hawaii say that CO2 levels in the atmosphere now stand at 387 parts per million (ppm), up almost 40% since the industrial revolution and the highest for at least the last 650,000 years.

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