Globalelectricitygenerationfromwindandsolarwas23percentin2015,andthankstoincreasesinwind-andsolar-generatingcapacity,thatnumberisexpectedtogrowto30percentby2020.
当然,商业市场如此复IIki,肯定比我简单几个例aDZQ说得复杂得多QhDU