This is achievable in home. Water wheels/mini turbines hooked up to your waste pipe in the sink, gutter, toilet, bath, shower etc. linked to an in home rechargeable battery. Essentially its waste energy. The flow from the national sewer network could surely be harnessed to generate electricity?
Yep, look at all the small rivers and streams as well, the river cole, the blyth to name a few, each capable of generating electricity........there is a way around this energy crisis, the answers just dont suit those in power, the rich business owners!