In actual fact, the full efficiency of usable energy for coal is just 29% of its original energy benefit, even though wind power offers a 1164% return on its first energy input. Melting of sea ice: Considering the fact that 1979, arctic sea ice has declined by thirty%. Sea ice https://solar-power72604.blogdigy.com/not-known-factual-statements-about-living-room-furniture-52912980