Madam, - Agriculture Correspondent Seán Mac Connell reports (December 6th) on the prodigious rate of growth of Japanese knotweed. Surely it is not beyond the ability of the biotechnology sector to combine this plant genetically with an existing biofuel plant (rape and elephant grass come to mind) to produce a phenomenally productive source of biofuel raw material. - Yours, etc,
GREG SCANLON, Shannon, Co Clare.