I buy only Pasture for Life beef, and lamb, when I can get it. This is beef and lamb which has spent its whole life grazing on unimproved pasture, only supplemented with hay from the same farm or local ones. It is low input and low emission meat, where it has been argued that these methods actually help to support wild flora and fauna in this country, because unimproved pasture attracts and supports the right environment for both, flora and insects and birds.
Not eating meat is not necessarily good for the planet, over 10,00s of thousands of years man has domesticated, and grazed cattle and sheep and much of the diversity of our plants and insects flourish and have adapted to living in pasture land. Reduce this drastically could lead to the extinction of 100s of plants and insects.
It could be argued that a vegetarian or vegan diet with its high reliance on field crops is far more damaging to the environment that cattle grazing on permanent grassland.
Growing crops means clearing land and planting huge acreages of identical crops, then keeping it weed free while these crops grow. This means removing all traditional field weeds. Cornflowers and corn cockle have become rare plants as a result of this weed elimination, whether by the use of biocides or cultivation.
Vegan diets, in particular are high reliant on soya products, mostly incorporated into what are known as Ultra processed foods (UPFs) . All these fake meats would be included in this group of foods, which are major contributors to obesity and also contribute to the illegal clearing of rain forests to increase the cultivation of soya.