It is not that you are going to get lesser intake of Protein and Energy from going Vegan, it is getting an equal or more amount of it while combating carbon footprint.
Going vegan stops the deforestation, soil degradation, and greenhouse gas emissions associated with meat production, helping to slow climate change and secure our global food supply according to an article from The Humane League.
“A vegan diet is probably the single biggest way to reduce your impact on planet Earth, not just greenhouse gases, but global acidification, eutrophication, land use, and water use,” Joseph Poore, at the University of Oxford, UK. This is better than switching to an electric car or cutting down on your flights.
Dairy and meat products take up 83% of global farmland, they provide just 18% of human calories and 37% of global protein, the report found.
All this does not mean that everyone has to suddenly switch to a vegan diet, instead, gradually reducing meat and dairy consumption is enough to significantly help the planet.