I've taken the lead in promoting the next generation of biofuel crops through my work on the Agriculture Committee.

One step to overcoming these issues is developing biofuel crops best suited to each region of the world.

Therefore, current biofuel crops, such as corn, are unpractical in different environments and regions of the globe.

"We're particularly concerned about potential environmental damage from intensively grown biofuel crops used for transport fuels."

Find out what else there is to consider about the top 10 biofuel crops.

Guayule can be an economically viable biofuel crop that does not increase the world's hunger problem.

The total area under biofuel crops more than doubled between 2004 and 2008, expanding to 36 million ha by 2008.

That land could have been growing trees, etc, rather than a biofuel crop.

Most importantly we must also invest in research to improve the cost effectiveness and environmental benefits of biofuel crops in the future.

In the previous series, the presenters planted their own biofuel crop, which was rapeseed.