Verkkohuge swaths of our country are turning away from fossil fuels as an energy source and investing in wind, solar and other renewable energy. By 2030, enhance international cooperation to facilitate access to clean energy research and technology, including renewable energy, energy efficiency and. Verkkoswitching from fossil fuels to renewable energy could save the world as much as $12tn (£10. 2tn) by 2050, an oxford university study says.