jiajinghuang3514 jiajinghuang3514
  • 29-05-2024
  • Geography
contestada

In recent decades, the level of Carbon Dioxide (CO2) in Earth's atmosphere.
Group of answer choices
a. has increased dramatically to a new high level
b. is difficult to measure reliably
c. has increased, but not by much compared to historical records
d. is lower than 100 years ago

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