永久链接提交的Robert G Kernodle (not verified)在太阳,22/03/2020——00:23
Let's see now, NO2 is 0.00003% [300 parts per BILLION] of Earth's atmosphere by volume.
If, as the article claims, "80% of the nitrogen compounds in the atmosphere are from human sources", then this would be 80% of 0.00003% = 0.000024% [240 parts per BILLION] of Earth's atmosphere by volume.
That means, for every one BILLION molecules of atmospheric gases, you would find 240 molecules of NO2. For every FOUR MILLION molecules of atmospheric gas, you would find ONE MOLECULE of NO2.
Let's see now, NO2 is 0.00003
Let's see now, NO2 is 0.00003% [300 parts per BILLION] of Earth's atmosphere by volume.
If, as the article claims, "80% of the nitrogen compounds in the atmosphere are from human sources", then this would be 80% of 0.00003% = 0.000024% [240 parts per BILLION] of Earth's atmosphere by volume.
That means, for every one BILLION molecules of atmospheric gases, you would find 240 molecules of NO2. For every FOUR MILLION molecules of atmospheric gas, you would find ONE MOLECULE of NO2.