First of all, sorry if I am going to repeat what has already been said, as other comments may have appeared in the meantime.
Zgarbas, you seem to ignore that* animals need to be fed (they are not just all cows browsing, and nowadays even cows are fed with other stuff, too. It's hard to imagine that in your country things are different... by the way, I guess the most popular meat today is poultry, not beef, at least in Western Europe, but I'm not sure). And for this special reason, a lot of plants already need to be cultivated (not grass, but grain, soy, corn etc.). Nadiatims is of course correct in saying that in the end of the day, we would consume much less plants in eliminating meat and other animal products, even if it seems paradoxical. You can impossibly nourrish as many people with meat/animal products as if you could do with plants. Another big problem are the huge amounts of dung (sorry, I don't know the exact English term for that, the dictionary contains too many) produced by livestock, which also leads to soil contamination. Of course, we're talking about large-scale livestock farming, and this has become a recognized problem, because it creates environmental pollution.
But you are right when you say that vegetarism or veganism is no magic cure for all the problems in the world. That's true.
*By the way, I don't want to come across as lecturing or arrogant or something, sorry if I don't always get the right tone. English is not my language, and I need more practice.
Quote:My grandpa is 85 and in perfect health (aside from some back aches caused by a bad fall a few years ago) whilst eating meat 3 times a day. So? Does that mean that just because one example of this exists then a sort of diet is good/bad?
I even know an old lady who is 102 and who eats meat thrice a day.
No no, I didn't want to say that you are not healthy when eating meat. As far as I know, there is no real evidence that nutrition has such a big impact on health at all (as long as you get all the necessary nutrients for which there are many possible sources).
But what I may have read into your comment (and other comments of this thread) is that you develop a nutritional deficiency when cutting out animal products (which is not true, and that has been proven). And for some cases, a vegan diet can actually be beneficial and meat/dairy products should be avoided (but that are special cases, certain diseases).
Quote:(or wait, are all these grandparents who are healthy eating meat just imaginary and nothing compared to the 20-year-old healthy vegetarians?)
Of course not. Health also has to do with pure luck, unfortunately.

And it is normal that the body degrades. In my opinion, nutrition as a health factor is overestimated. Please note again that I didn't want to say that people get ill by eating meat or stay perfectly healthy by avoiding it. But know that there are also vegans who have been vegan for 40, 50, or 70 years... I wouldn't say that they are much healthier (or healthier at all) than omnivores, but there are not more fragile or anything. And there are still no long-term surveys that prove anything, no matter in what direction. The whole point is that you obviously don't *need* meat in order to stay healthy (vegetarism is nothing new, most people in India usually never eat meat etc.).
By the way, my father used to eat meat only once a week when he was a kid (50s-60s). It was normal then, because meat was very expensive at the time. Meat and dairy products are ridiculously cheap nowadays.
Quote:"I'm young and healthy enough to not need them and have enough time and money to cook alternatives?".
Just a few remarks on money, time and health: vegan food is actually cheaper. There are, of course, luxury products for vegans, too, but you are not obliged to buy them. And again, you can get all the nutrients you need with a vegan diet. It's not only for the young and healthy, quite on the contrary. And I don't see why more time is needed in order to prepare vegan or even vegetarian dishes.
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@Tzadeck: What'sd wrong, Anki session over? lol</ot>