Cultivation is not needed for survival. Oxygen, water and food is need for survival.
Food can be fruits and other non-cultivated food items as well. The more you plant trees, the more it balances eco-system. Crop cultivation could cause soil erosion and loosing of fertility, so no it doesn't balance eco-system in fact damages....
Source:
The Environmental Effects of Conventional and Organic/Biological Farming Systems.
WWF - Farming: Soil erosion and degradation
Ever heard of Artificial crops, chemical and inorganic fertilizers used in cultivation?
So you are unable to refute me on oxygen, Good. So that makes me conclude that Vegans would need more land and that would also decrease oxygen levels. And you were speaking of minimum collateral damage? No I am not trolling but replied you based on the points you raised.
Yes it shouldn't be, but didn't you just say that if UAE allows it doesn't mean, we should allow it. Now the point the other PDF poster was trying to make was that being a muslim country, they allow things which are not acceptable otherwise in Islam, so why is India which claims to be highly accommodating bans certain things based on religion...