Retired software kingpin and richest man in the world Bill Gates says today’s renewable-energy technologies aren’t a viable solution for reducing CO2 levels, and governments should divert green subsidies into R&D aimed at better answers.

Gates expressed his views in an interview given to the Financial Times yesterday, saying that the cost of using current renewables such as solar panels and windfarms to produce all or most power would be “beyond astronomical”. At present very little power comes from renewables: in the UK just 5.2 per cent, the majority of which is dubiously-green biofuel burning1 rather than renewable ‘leccy – and even so, energy bills have surged and will surge further as a result.

In Bill Gates’ view, the answer is for governments to divert the massive sums of money which are currently funnelled to renewables owners to R&D instead. This would offer a chance of developing low-carbon technologies which actually can keep the lights on in the real world.

“The only way you can get to the very positive scenario is by great innovation,” he told the pink ‘un. “Innovation really does bend the curve.”

Gates says he’ll personally put his money where his mouth is. He’s apparently invested $1bn of his own cash in low-carbon energy R&D already, and “over the next five years, there’s a good chance that will double,” he said.

The ex-software overlord stated that the Guardian‘s scheme of everyone refusing to invest in oil and gas companies would have “little impact”. He also poured scorn on another notion oft-touted as a way of making renewable energy more feasible, that of using batteries to store intermittent supplies from solar or wind.

“There’s no battery technology that’s even close to allowing us to take all of our energy from renewables,” he said, pointing out – as we’ve noted on these pages before – that it’s necessary “to deal not only with the 24-hour cycle but also with long periods of time where it’s cloudy and you don’t have sun or you don’t have wind.”

Bill Gates: Renewable Energy Can’t Do The Job | The Global Warming Policy Forum (GWPF)