-energy (capasity to do work)
-Power (rate of doing work)
black out of 03 reminds how depend on energy
-86% of all commerical energy is generated by fossil fuels
-40% petroleum
-23.3% coal
-22.5% natureal gas
-coal supples last more centuraries at present rate of useage
-neculear power 6.5% all comm. energy
-20% electricty in the U.S
-energy=essential for most activities of society, corrolates with standard of living
-difference in per capita countires wirg realtivy equal standards of living.
-dffs are based on level of industralized and partly on policies attidtueds and traditions
-Largest share of U.S energy is used by industry
-transportation comsumes about 27%
measure os energy efficeney = amount used per unit of economic output
-damaged cause by mining, shipping, processing, and using fossil fules may necessitate cutting back on our use.
-coal= dirty danageruous; treatment=remove contaminates, reduce emissions, and make use more efficent
-natural gas=convient; large easliy accesssible gas deposits are found in coal seams in wastern U.S: environmantal and social extration costs= high
-nuclear energy introduces serious problems
-dangerous accidents that relase hazadrous radioactive materials
– don’t know where to put waste, and how to ensure it will remain safe.
-No current energy sources offer secuirty, we urgently need to develop alternative sources of sustainable energy.
