The Economist har i siste nummer noen grafer med oppdaterte tall for investeringer og kostnader for solenergi, og skriver at:
"But the days when renewables were largely a sop to rich-world consumers’ consciences are clearly over. Nearly half of last year’s investment was in developing countries, notably China, whose energy concerns have more to do with the near term than with future global warming. It worries about energy security, and it wants to clean up its cities’ air, made filthy partly by coal-burning power plants. The 2014 figure is slightly less than the previous peak, in 2011 (see chart). But investors today get more energy for their buck. The cost of battery storage, a vital part of a solar-powered future, has fallen by 60% since 2005, and the overall cost of a solar-power system is down by 75% since 2000. IHS, a consultancy, reckons the cumulative fall will be 90% by 2025."
Det er med andre ord ikke lenger slik at solenergi er noe bare eksentriske miljøvernere i California og Tyskland monterer på hustakene sine for å redde verdens klima. I dag er det i utviklingsland, og særlig i Kina, at investeringene øker mest. Det hjelper at det reduserer luftforurensningen og er bra for miljøet, men hovedbegrunnelsen deres er at det lønner seg.