Trees on the Range?

The UK Committee for Climate Change (CCC) is advocating that farmers across this country should halve their numbers of cattle and sheep as these animals are sources (at both ends) of methane, which is a very potent 'greenhouse gas' (https://www.theguardian.com/environment/2018/nov/15/tree-planting-double-uk-climate-change). They suggest that pigs and chickens would be less problematic in terms of climate change. The CCC also recommends that farmers should be financially rewarded for planting trees to take up surplus carbon dioxide. These are all sensible suggestions but some environmental organisations evidently feel that the magnitudes of the suggested changes are too small to deal with the developing crisis. Clearly, one would hope for similar drives in other areas of the globe.