Mr. John Spink:

That must be done on the basis of data collected on those farms and a knowledge of how changing management alters the emissions or the sequestration. That would not be measured that on the individual farm but if it is known, for example, that changing hedge cutting from once a year to every other year would alter carbon sequestration and that has happened on a farm, it can be calculated for that farm and stated that it has increased its sequestration by X or Y. I might pass over to Dr. Lanigan on that.