You have all your other renewable sources of energy but this is a big challenge for humanity.

我们拥有可再生能源，但这对人类来说是一个巨大的挑战。

Which obviously, is a renewable source of energy.

这显然是一种可再生能源。

He says the fracking can help Europe meet its energy needs if the plan includes fossil fuels and renewable sources of energy like solar and wind.

他说如果其计划包括化石燃料和太阳能、风能等可再生能源，那么压裂法能帮助欧洲满足其能源需求。

One reason why the growth in gas-fired stations will be more gradual this time is that American regulators are ordering power utilities to make more use of wind, solar and other renewable sources of energy.

这次新建燃气发电厂的数量将有所放缓，原因之一在于，美国电力监管机构下令让电力公司使用更多的风能、太阳能以及其他可再生能源。