Future strategies based on renewable power include:

• Centre for Economic Performance (2015) – A Global Apollo Programme to Combat Climate Change
• Greenpeace (2015) – 2030 Energy Scenarios (85% renewable)
• Green Party (2015) – Transform the SW (100% renewable)
• Centre for Alternative Technology (2013) – Zero Carbon Britain
• WWF (2011) – Positive Energy (60% of UK electricity by 2030)
• WWF (2011) Energy Report (100% of world energy by 2050)

The Zero Carbon Britain project by the Centre for Alternative Technology is particularly recommended as a guide to the issues and possibilities. There are further studies available on their ZCB website and the following short video provides an introduction.

For inspiration on what a sustainable future may look like in 2050 see The World We Made by Jonathan Porritt. The Middle Way Society have published a good podcast interview (38 minutes) with Jonathan about it and the following video provides a very brief introduction: