Question

source data: noaa global monitoring laboratory, measured at the mauna loa observatory. select the true statements about atmospheric co₂ levels from 1958 to 2025. the long - term increase in atmospheric co₂ levels has been much smaller than the short - term seasonal increases and decreases caused by photosynthesis. the atmospheric co₂ concentration in 2020 was approximately 100 ppm greater than it was in 2000. the concentration of co₂ in the atmosphere increased from the 1960s to the 2020s. the atmospheric co₂ concentration increased by more than 40 ppm between 1980 and 2010.

Explanation:

• Analyze the graph showing atmospheric CO₂ levels over time. The long - term trend is an upward increase. Seasonal variations are smaller compared to the long - term increase. By observing the y - axis values for different years, we can check the magnitude of increase.
• For the first statement, the long - term increase is much larger than short - term seasonal changes.
• For the second statement, by looking at the graph, the CO₂ level in 2020 is around 410 ppm and in 2000 around 370 ppm, so it is approximately 40 ppm greater, not 100 ppm.
• For the third statement, clearly from the graph, the CO₂ concentration has increased from the 1960s to the 2020s.
• For the fourth statement, in 1980 the CO₂ level is around 335 ppm and in 2010 around 390 ppm, an increase of more than 40 ppm.

Answer:

• The concentration of CO₂ in the atmosphere increased from the 1960s to the 2020s.
• The atmospheric CO₂ concentration increased by more than 40 ppm between 1980 and 2010.