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