Question

30 multiple choice 1 point carbon dioxide concentration at mauna loa observatory approximately how much did carbon dioxide increase from 1960 to 2000? 300 ppm 100 ppm 20 ppm 50 ppm 220 ppm

Explanation:

Step1: Identify CO₂ concentration in 1960

From the graph, in 1960, the CO₂ concentration is approximately 315 ppm.

Step2: Identify CO₂ concentration in 2000

From the graph, in 2000, the CO₂ concentration is approximately 370 ppm.

Step3: Calculate the increase

Subtract the 1960 value from the 2000 value: $370 - 315= 55$ ppm, which is closest to 50 ppm.

Answer:

50 ppm