The graph shows records of temperature (light gray line) and CO₂ (dark gray line) over the past 1,000 years. CO₂ is recorded in parts per million (ppm) .
-Currently, atmospheric CO₂ levels are approximately 400 ppm. The annual mean growth rate in CO₂ is about 2 ppm/year. Assuming this trend continues, what would you predict the CO₂ level to be in 100 years?

Question

The graph shows records of temperature (light gray line) and CO<sub>2</sub> (dark gray line) over the past 1,000 years. CO<sub>2</sub> is recorded in parts per million (ppm) . -Currently, atmospheric CO<sub>2</sub> levels are approximately 400 ppm. The annual mean growth rate in CO<sub>2</sub> is about 2 ppm/year. Assuming this trend continues, what would you predict the CO<sub>2</sub> level to be in 100 years? A) 100 ppm B) 200 ppm C) 600 ppm D) 1,000 ppm

Quizplus · Accepted Answer

If the annual mean growth rate in CO2 is about 2 ppm/year, then in 100 years, the CO2 level would increase by 200 ppm (2 ppm/year x 100 years), resulting in a total of 600 ppm (400 ppm + 200 ppm). Therefore, the best choice is C.

The Graph Shows Records of Temperature (Light Gray Line) and CO2

The Graph Shows Records of Temperature (Light Gray Line) and CO₂