There is always debates on the issue on eating less meat for the purpose of sustainable earth. In a One Health point of view eating less meat may contribute to minimizing chance of zoonotic diseases being spread to human. Raising a meat bearing large animal need one or more years. Animal such as cow release hugn amount of methane, a so-called greenhouse gas which trap the heat lead to greenhouse effect. As a result drought, storm, rising sea level may either destroy forest directly, or affecting farming land which forest may need to be destroyed for cultivation. Increased human population, moving the population into sub-forest area due to lack of city area in turns moving the farmland towards the forest. Again forest are destroyed for more land.

So what is important in loosing our forest? Wildlife loss their home, some species may gone. Loss of biodiversity may result in pressure in wildlife species and infective agents may be redistributed leading to unexpected health problem or even mutations. Moving farmland close to forest lead to increase chance of infective agent originated from wildlife to affect domestic anmial, and genetic re-arrangement may lead to the development of new infective agents affecting human.

Requiring less meat to reduce farm animal. Less crops or grassland for feeding them and more land can be reserved for growing different crops for human consumption. This makes better soil quality and more food for human and less starving problem, this in turns improve health quality and better immunity to fight against diseases.