Over the last ~100 years, greenhouse gases have increased, thereby decreasing the effective emissivity of the Earth from 0.6 to 0.5986. How much would the Earth's temperature change simply due to this decrease in emissivity? a. cool by 0.1 -0.2 K
b. cool by 0.0 -0.1K
c. change by <0.01K
d. warm by 0.1 -0.2 K
e. warm by 0.5 - 1.0K

d. warm by 0.1 - 0.2 k

Explanation:

The earth global warming is increasing everyday due to the pollution. The effective emissivity is the ability to emit energy from the surface in the form of radiations. The earth's effective emissivity is declined by 0.6 to 0.5968. The change is due to the green house gases that are increased  which has led the temperature of earth change by 0.1 to 0.2k warmer.

it is very hard for the climatologists to precisely predict how will the global temperatures be changing so there's lots of models, some of which differ significantly, this is due to multiple factors, and probably the most important is the human activity.

humans have been a key factor in climate change around the globe since the start of the industrial revolution, and in the past few decades the consequences are becoming more obvious. there's lots of emission of pollutants in the atmosphere as well as changing the environment on the surface itself, so it's really hard to predict how will that go in the future because there's some countries that are reducing the damage and are going towards green energy, while others are stubbornly continuing with pollution and damages to the environment.