Get latest articles and stories on Latest News at LatestLY. The global energy transition -- the shift from fossil-based fuels such as oil and coal to renewable sources like wind and solar -- is estimated to become a USD 23-trillion market by 2030, US Energy Secretary Jennifer Granholm said on Tuesday as American companies seek closer ties with Indian firms to tap this opportunity. Latest News | Energy Transition to Become a USD 23-trillion Market by 2030: US Energy Secretary.