然而,当这个“未来Mj1B到来之时,越来越少I74X年轻人与越来越多的MPxw年人,前者是否能承rNax得起后者退休后生活c3SB需的庞大开支qVKm
Globalelectricitygenerationfromwindandsolarwas23percentin2015,andthankstoincreasesinwind-andsolar-generatingcapacity,thatnumberisexpectedtogrowto30percentby2020.