In the shift towards a Low-Carbon Economy, we must make better use of fossil fuels by increasing energy efficiency. We need to improve how we use energy from sources like coal, oil, and gas in the short term. The focus is on enhancing efficiency in using fossil fuels for generating power, in buildings, and for transportation. The goal is to make these processes more effective and environmentally friendly. By finding better ways to use fossil fuels more efficiently, we can make progress towards a cleaner and greener future.