A huge proportion of the world’s population is vegetarian, eating no meat for a range of reasons, including lack of availability and poverty, ethical and religious reasons, personal health and environmental health reasons. Among that number are many who are vegan, eating no animal products. However, the environmental impact of raising livestock remains incredibly high; natural ecosystems are removed to create grazing land and to grow crops to feed cattle, for instance. From rearing and farming to slaughter, butchery and processing, the meat industry has an enormous carbon hoofprint, as it were.
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Source: Phys.org