Phasing old bulbs out by 2030 would save the output of 650 power plants and avoid the release of 700 million tons of carbon into the atmosphere each year.
到2030年逐步淘汰旧灯泡将节省650家发电厂的输出功率，并避免每年向大气排放7亿吨碳。
2
Power plants fueled by natural gas release less carbon dioxide — but natural gas is more expensive.
以天然气做燃料的发电厂释放更少的二氧化碳，但问题是天然气的成本更高。
3
Nuclear power plants release no carbon dioxide at all — but there's the problem of what to do with the nuclear waste.