The hon. Gentleman is making an excellent speech. Members on both sides of the Chamber would agree that the decline in the bee population in this country is higher than in any other country in western Europe. The hon. Gentleman is contending that the reason for that decline is the use of such pesticides. If that is not correct—I do not know whether it is or not —can he suggest a possible alternative reason, or does every route that he has used to explore this issue lead him to conclude that such pesticides are the cause of the decline in the bee population in this country?