Professor John FitzGerald:

It is a question of whether it would be a significant factor in helping us meet our climate change targets. We have limited resources and we tend to stick to the high level by recommending changing land use to woodland or crops. We say these changes suck carbon out of the atmosphere and are they the way to go, rather than getting too prescriptive about the crops. Research has been done showing different grasses in the sward suck in more carbon at night and so on.