The atmospheric concentration of carbon dioxide increased from 278 ppm in 1790 to 383 ppm in 2007. What is the approximate percent increase in carbon dioxide concentration from 1790 to 2007?

The atmospheric concentration of carbon dioxide increased from 278 ppm in 1790 to 383 ppm in 2007. The amount by which atmospheric concentration of carbon dioxide increased would be

383 - 278 = 105 ppm

The percent increase in carbon dioxide concentration from 1790 to 2007 would be

Increase/initial concentration * 100

It becomes

105/278 * 100 = 37.77%

The approximate percent increase would be 38% rounded up to the nearest whole number

Answer: 38%

Explanation:

The percentage increase will be change in concentration of C02/Initial concentration of C02 * 100%

Change in concentration = final concentration - initial concentration = 383ppm - 278ppm

= 105ppm

Initial concentration = 278ppm

% increase = 105/278 * 100%

%increase = 37.8% approximately 38%