Question

At which point did greenhouse gases first begin to affect temperatures on Earth? Options: a. Industrial Revolution b. Prehistoric times c. 20th century d. 19th century

Answer 1

Step-by-step explanation:

Concentrations of the key greenhouse gases have all increased since the Industrial Revolution due to human activities. Carbon dioxide, methane, and nitrous oxide concentrations are now more abundant in the earth's atmosphere than any time in the last 800,000 years.