Website : www . apple . com In North Carolina , Apple has made a point of starting to practise smarter habits with its power . While it won ’ t publish its PUE , this centre is reported to tie with Facebook ’ s Sweden centre at 1.1 . It achieves this with the help of biogas , which is the renewable fuel source formed when organic material , for example food waste , starts to break down . With so many landfills nearby , the centre has plenty of energy sources . Apple is also using two 100-acre solar farms , which means the centre uses the most solar power of any data centre in the world . 02 30 November 2017