The intial level....ppm was optimum to
maintain the heat balance & temp. on earth.
Options
350
450
325
425
Answers
Answer:
this answer is 450.
Explanation:
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Answer:
350 ppm
Explanation:
The initial level of 350 ppm was optimum to maintain the heat balance & temp. on earth.
Because The atmospheric concentrations of carbon dioxide, methane, and nitrous oxide have increased significantly since the Industrial Revolution began. In the case of carbon dioxide, the average concentration measured at the Mauna Loa Observatory in Hawaii has risen from 316 parts per million (ppm) in 1959 (the first full year of data available) to more than 411 ppm in 2019.
PPM-This is an abbreviation for "parts per million" and it also can be expressed as milligrams per liter (mg/L). This measurement is the mass of a chemical or contamination per unit volume of water. Seeing ppm or mg/L on a lab report means the same thing.