Will the rate-of-conversion problem derail alternative energy?

My latest column on Scitizen entitled "Will the rate-of-conversion problem derail alternative energy?" has now been posted. Here is the teaser:

Many alternative energy advocates claim that it is possible to replace our fossil fuel economy with one that runs on a combination of nuclear power and renewable energy from the wind, the sun and the farm. Credible scientific estimates suggest that they are right. However, those advocates often fail to consider one critical issue that could derail their plans, the rate-of-conversion problem. How long will it take to make such a transition? And, more importantly, how long do we have?....Read more