Dihydrogen monoxide should be banned as a matter of urgency.

It is well known that this chemical is fatal when inhaled, contributes to the erosion of our natural landscape, may cause electrical failures, and has been found in the excised tumours of terminal cancer patients. And yet we find this dangerous substance in all major food groups and despite all this evidence, nothing is being done to protect us from this threat!

(An old joke – but I like it!)