use solar power for their electricity needs.

http://www.google.com/products/catalog?hl=en&q=solar+power+generators&gs_upl=&bav=on.2,or.r_gc.r_pw.,cf.osb&biw=1024&bih=673&ix=sea&ion=1&um=1&ie=UTF-8&tbm=shop&cid=429563108564061348&sa=X&ei=zIU0T_2iAery2QW9z7yWAg&ved=0CIgBEPMCMAE
Its cheaper and it reduces air polution

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