Are you ready for a yummy diet of potatoes, chicken, and no booze? Times of London:

A government-sponsored study into greenhouse gases found that producing 2.2lb of lamb released the equivalent of 37lb of carbon dioxide.
The problem is because sheep burp so much methane, a potent greenhouse gas. Cows are only slightly better behaved. The production of 2.2lb of beef releases methane equivalent to 35lb of CO2 Tomatoes, most of which are grown in heated glasshouses, are the most “carbon-intensive” vegetable, each 2.2lb generating more than 20lb of CO2 Potatoes, in contrast, release only about 1lb of CO2 for each 2.2lb of food. The figures are similar for most other native fruit and vegetables.
“We are not saying that everyone should become vegetarian or give up drinking but moving towards less carbon intensive foods will reduce greenhouse gas emissions and improve health,” said Kennedy.
The climate committee is analysing emissions from farming and will suggest measures to reduce them. However, it has concluded that people will have to change their habits.
Alcoholic drinks are another significant contributory factor, with the growing and processing of crops such as hops and malt into beer and whisky helping to generate 1.5% of the nation’s greenhouse gases.