Question

By approximately what percent has the concentration of atmospheric carbon dioxide increased over the past 130 years?

1) From about 680 ppm to 802 ppm, about 18
2) From about 280 ppm to 402 ppm, about 44
3) From about 200 ppm to 402 ppm, about 100
4) From about 380 ppm to 502 ppm, about 32

Answer 1

The concentration of atmospheric carbon dioxide has increased by approximately 43% over the past 130 years.

Step-by-step explanation:

The concentration of atmospheric carbon dioxide has increased by approximately 43% over the past 130 years. This can be calculated by finding the percentage increase between the initial concentration and the final concentration. Taking option 2) From about 280 ppm to 402 ppm, we can calculate the percentage increase as follows:

Percentage Increase = (Final Concentration - Initial Concentration) / Initial Concentration * 100

Percentage Increase = (402 ppm - 280 ppm) / 280 ppm * 100

Percentage Increase = 122 ppm / 280 ppm * 100

Percentage Increase ≈ 43.57%