Answer: Life span, Life expectancy.
Explanation:
the answer to this question is the last one i think it might be the first one
<span>Factors that contribute to warming include
1. Carbon dioxide (CO2) from fossils fuel combustion.
2. Parts of earth's surface which have low reflectivity ( low albedo).
3. Tropospheric Ozone (O3).
4. Black carbon aerosols and soot particles.
5. methane (CH4) from decomposition and feedlots.
6. Nitrogen oxides (N2O) from denitrification and fossil fuel combustion.
Factors that contribute to cooling include;
1. Condenses water vapor (Cloud albedo).
2. Parts of earth's surface with high reflectivity (high albedo).</span>
The ionosphere<span> can reflect radio waves directed into the sky back toward the Earth. </span>