 However, the proactionary principle argues that "sufficient study" may in some cases be impractical.For instance, in releasing a new life form into the biosphere — whether genetically modified plant, animal, or bacteria — one would have to simulate the biosphere to achieve "acceptable levels of predictability".While the innovator of the new life form might point out that such a simulation would be a heavy burden, the other life forms in the biosphere could suffer irreparable harm in the case of an untested release.