Question

In the greenhouse effect, far infrared radiation is (answer here options Earth's emitted and absorbed by surface, emitted from, absorbed by) and absorbed and reemitted by (answer here options: some, all) gases in the atmosphere. These gases have (answer here options: decreased, increased, been unchanged) in concentration over the past century.

Answer 1

In the greenhouse effect, far infrared radiation is emitted from the Earth's surface and absorbed and reemitted by some gases in the atmosphere. These gases have increased in concentration over the past century.