Human Interference Flashcards
What is the percentage increase in atmospheric CO2 levels over the past 25,000 years?
Atmospheric CO2 levels have increased from 190 parts per million to 400 parts per million, representing a significant increase.
When did the significant increase in atmospheric CO2 levels begin?
The significant increase in atmospheric CO2 levels began since the 1950s.
What is the role of the natural greenhouse effect in maintaining Earth’s temperature?
The natural greenhouse effect maintains Earth’s life-supporting temperature of 15°C. Without it, the average temperature would be -6°C.
How much of the solar radiation (S Wave radiation) is reflected by clouds, aerosols, and gases in the atmosphere?
31% of the solar radiation is reflected by clouds, aerosols, and gases in the atmosphere.
What happens to the remaining percentage of solar radiation?
The remaining 69% of solar radiation is absorbed into the oceans.
By what percentage has CO2 in the atmosphere increased over the last 300 years?
CO2 in the atmosphere has increased by 40% in volume over the last 300 years.
What proportion of total emissions is accounted for by chemical processes in cement production?
Chemical processes in cement production account for 6% of total emissions.
What percentage of the Earth’s surface do wetlands cover?
Wetlands cover 3% of the Earth’s surface.
