The green revolution risks running short of minerals, money, and places to build.
Economist
+ Two-thirds of humankind now lives in countries where wind and solar power offer the cheapest new electrical-generating capacity
+ Annual clean-energy investment, already at an all-time high, would have to exceed $4trn by 2030, three times its average over the past five years. And the market for key minerals needed to build clean-energy kit would expand nearly seven-fold
The bottlenecks which could constrain emission cuts
