whether the introduction of transgenic plant will result in an increase in the land use for agriculture, where agriculture could not be practiced earlier, i.e. bringing valuable natural ecosystem under agriculture. The greatest risk of a transgenic plant being released into the environment is its potential to spread beyond the areas planted to become a weed. Although there has been little discussion about crops becoming weeds as a result of plant breeding [97], there may be some exceptions, e.g. oilseed rape in Europe.