Bioenergy has not take over the energy market for the simple fact that it is not commercially viable. Making bioenergy commercially viable will take a couple of steps, some political and some scientific. By overriding these barriers it’s possible that the majority of energy produced could be from a renewable biological source.
The first barrier to bioenergy is the political aspect. There is much more energy efficient alternatives to corn for producing ethanol or biodiesel fuel. However, since the government is so heavily influenced by the corn producers, which produce much more corn than the market could need, inefficiency rains supreme.The full explanation can be found at http://www.nytimes.com/gwire/2011/07/14/14greenwire-miscanthus-switchgrass-show-promise-as-corn-re-35815.html If a more productive plant such as switchgrass or hemp was allowed to be grown than biofuel could easily sustain a large portion of the fuel market.
The second barrier to bioenergy is our current technology. If we could for example break down cellulose, the most abundant source of locked energy on our planet, then all of our energy needs could be satisfied. Scientific advances take time and more importantly research capital. The research capital will simply not be fully there until we run close to running low on our oil reserves.
Improving bioenergg’s commercial viability is going to take a lot of change.