Links between trade and the environment have aroused considerable interest, both in terms of the impact of trade liberalisation on the environment, and also the impact of environmental policy on production and trade. A key environmental concern is global warming. The agricultural sector both contributes to, and will be affected by, climate change. Various mitigation strategies have been proposed for agriculture, including a limit on animal numbers, and restrictions on Nitrogen fertiliser application. The effects of these mitigation options on production, trade and emissions are analysed in this paper, using a partial equilibrium, agricultural multi-country, multi-commodity trade model, extended to include production systems and GHG emissions.