Single covalent carbon-carbon bonds have a bond energy of 83 kcal/mol while visible light from the ...

Answer: The fact that carbon-carbon bonds have a high bond energy indicates that the bonds are quite stable and do not easily break apart. The stability of carbon-carbon bonds provides relatively stable molecules in biological systems that do not degrade at temperatures typically found on earth. The fact that visible light waves from the sun contain less energy than what is required to break a carbon-carbon bond indicates that carbon-carbon bonds will not degrade when exposed to visible light. If the earth's atmosphere loses its ability to absorb or reflect ultraviolet (UV) radiation, which contains more energy than visible light, biological systems will be damaged, as UV radiation will damage critical biomolecules in living organisms on the surface of the earth.