Domestic economic and political developments may provide an answer. Germany passed a substantial renewable energy law in 2000, and by 2008 the share of renewable energy had jumped from 2 percent to 9 percent.
Domestic pang-ekonomiya at pampulitikang development ay maaaring magbigay ng isang sagot. Alemanya ang pumasa sa isang malaking nababagong enerhiya batas noong 2000, at sa pamamagitan ng 2,008 mga bahagi ng nababagong enerhiya ay jumped mula sa 2 porsiyento hanggang 9 porsiyento.