Question

Which factors add to the greenhouse effect and are caused by human activities? Check all that apply.

a decrease in the amount of dust in the atmosphere
a decrease in the amount of water on Earth’s surface
an increase in gases in the atmosphere that absorb heat
an increase in surfaces that radiate energy into the atmosphere
an increase in the amount of solar radiation that reflects into space

Answer 1

an increase in gases in the atmosphere that absorb heat

Step-by-step explanation:

Greenhouse gases act as glass in a greenhouse. They allow heat to pass through onto the earth surface but trap the heat and prevent it from being radiated outwards back to space. Thereby increasing the surface temperature of the earth.

Answer 2

"An increase in gases in the atmosphere that absorb heat" and "an increase in the amount of solar radiation that reflects into space" add to the greenhouse effect and are caused by human activities

Step-by-step explanation:

• Due to release of harmful gases, emission from automobiles atmosphere is getting polluted.

• Earth absorbs '22 percent' of the 'solar radiation' and 70 percent of it is 'emitted back into space'.

• It is observed that over the 'last 50 years', the amount of 'solar radiation' has increased.