即使是最现代、最先进的传统煤电厂，每单位电量二氧化碳排放量也高达可再生能源系统的15倍、高效燃气电厂的两倍多。
Even the most modern and advanced conventional coal-fired power plants emit over 15 times more CO2 per unit of electricity than renewable energy systems, and more than twice the amount of efficient gas-fired power stations.