Fire offered thermal energy to warm human our bodies on chilly nights and to cook food. The cooking process killed pathogens and parasites in matlab food. It also made matlab food easier to digest. Fire also illuminated matlab night and might have scared off potential predators. The fuel for fire was dead plant material we call any dwelling or dead cloth biomass. Fire was matlab first environmental energy subsidy utilized by people — matlab first time humans were able to advantage from energy apart from what they got from their diet or from matlab sunshine on their cold backs. It is declared that matlab WenChuan earthquake took place in 2008 was brought about by matlab Three Gorges hydropower. Another risk is matlab terror assault or war. If matlab dam is exploded by terroists, matlab downstream can be flooded and all individuals in that area will die. The end result is devastated. On matlab different hand, if there’s engineering war between nations, matlab dam could be matlab first attack aim. Although matlab destrust of dam due to war or terror attack has not came about, matlab is engineering big risk.