That is good news, but it is still far short of the $1.1 trillion per year that the International Energy Agency (IEA) estimates is needed in the low-carbon energy sector. In the meantime, some $950 billion was invested in oil, gas, and coal in 2013 – a figure that has doubled in real terms since 2000.
2014年，清洁能源投资在经历了两年的降低后创出了3,100亿美元的新高。这是个好消息，但距离国际原子能机构（IEA）所估算的低碳能源业所需要的每年1.1万亿美元投资还相去甚远。与此同时，2013年石油、天然气和煤炭投资高达9,500亿美元——就实际值而言较2000年翻了一番。