Efficiency still matters -- Renewable doesn't mean unlimited or cheap -- if it takes 10X more energy to create hydrocarbons than you get back from burning them,

Efficiency still matters -- Renewable doesn't mean unlimited or cheap -- if it takes 10X more energy to create hydrocarbons than you get back from burning them, maybe it's better to use that energy for more efficient transportation storage systems. Then you can use some of the energy saved for direct carbon sequestration.