With threats such as climate change and declining oil stocks looming, we should be going all out to find alternative sources of energy. (sciencemag.org)
Perhaps not surprisingly, most investments in alternative sources of energy are coming from pockets other than those of the oil companies. (heatisonline.org)
We aim to ensure that the contribution from alternative sources of energy reaches a minimum of 10 % of what we need in a decade. (citifmonline.com)