ENVS 1000U Lecture 20: Lecture 20
3 Dec 2016
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Document Summary
Include hydroelectricity, nuclear, renewables and fossils fuels. Fossil fuels - highly combustible substances formed from remains of dead organisms. Main source of energy are fossil fuels because of high-energy content which makes them efficient to burn, ship, and store. Each type of fossil fuel has unique extraction processes and environmental impacts: types, coal, oil, natural gas. Once formed - oil and gas move upward in porous rock until stopped by dense cap rock that prevents further movement. Oil is a liquid fossil fuel made of numerous hydrocarbons. Natural gas is a gaseous fuel composed primarily of methane. People have used solid forms of oil (i. e. tar) for centuries. The (cid:862)age of oil(cid:863) (cid:449)ith e(cid:454)tra(cid:272)tio(cid:374) a(cid:374)d (cid:449)idespread use (cid:271)ega(cid:374) i(cid:374) the (cid:1005)85(cid:1004)s (cid:894)(cid:449)ith the. Industrial revolution) first bottled and sold as a healing aid, but is carcinogenic: this (cid:862)ro(cid:272)k oil(cid:863) (cid:272)ould (cid:271)e used la(cid:373)ps a(cid:374)d as a lu(cid:271)ri(cid:272)a(cid:374)t first oil well drilled in titusville, pennsylvania in 1859.
