Keelingʹs reports from Mauna Loa demonstrated ______________. A) that as distances from cities decreased, CO₂ concentrations increased B) the presence of El Niño C) an increase in tropospheric CO₂ from the 1950s to present D) that sediments deposited on the seafloor can yield clues about past climates E) that CO₂ levels have been stable over the last 40 years

Question

Quizplus · Accepted Answer

Keeling's reports from Mauna Loa showed an increase in tropospheric CO2 concentrations from the 1950s to present. None of the other choices are supported by Keeling's reports.

Keelingʹs Reports from Mauna Loa Demonstrated ______________