How can the growth of investments in renewable energy to achieve higher energy efficiency levels impact on world oil prices and the economic growth of the OECD countries ?

How can the growth of investments in renewable energy to achieve higher energy efficiency levels impact on world oil prices and the economic growth of the OECD countries ?
How can the growth of investments in renewable energy to achieve higher energy efficiency levels impact on world oil prices and the economic growth of the OECD countries ?Discuss.