Unfortunately a tax rise on meat products will drive us to seeking cheaper sources of meat, and thus make intensive farming and agribusiness thrive rather than encourage good husbandry, Ecologically, more damage is being done to the forests by cultivation of palm oil, ground nut oil, and crops for biofuels so the 'meat farming destroys the land mantra' is false. Animals need fresh grass and borage to eat, and these crops help to replenish the oxygen amd fix nitrogen in the soil to make it fertile. The effluent produced also replenishes the nitrogen naturally, Although methane is a potential greenhouse gas, it remains at low altitudes and does not significantly deplete the ozone layer. One other ecological aspect often overlooked is that as vegetation decays at life end it releases the carbon as CO2 and CH4 those well known greenhouse gases. Nothing is wasted or lost, it all goes up in the air in the end. Thats true recycling.