可再生能源和不可再生能源的好與壞?

adv:
renewable
save raw materials on earth eg coal
reduce amount ofwaste and pollutions eg sewage air/water pollution
reduce amount of greenhouse gases eg CO2

dis:
huge investment $ eg hydroelectric
require large piece of land eg almost all kinds
eg wind power need to build power station,it is quite noisy and it is worked only when there is wind

2008-06-05 12:39:49 補充：
adv: hydroeletric use river to build dam and collect the electricity. This can also improve nevigation ofthose area near the river

reduce the intense of global warming