Beef Cattle and Sheep (Carbon Footprint)

Will the Minister address the point that was made by the hon. Member for Tiverton and Honiton (Neil Parish) about methane emissions? I believe that 37% of methane emissions are attributable to the livestock sector, but the hon. Gentleman argued that because they come from a natural source they may not be as environmentally damaging as emissions from other sources. My understanding is that emissions are emissions and cause the same harm regardless of where they originate.