I feel like instead of a giant push for veganism, there should just be a push to eat what's sustainable.

Beef and dairy? Causes huge amount of greenhouse gasses and with current methods of production, it is not sustainable

Blue fin tuna? These things have been way over fished and are endangered. Not sustainable, just try it once and move one with your life.

Tilapia ? These things grow like weeds and can be fed efficiently. Go ahead, good source of protein for your diet.

Honey? We need bees and they are an important pollinator for crops. Go nuts (just watch your sugar intake}

Almonds? Takes huge amounts of water to grow and exacerbates droughts in the areas they are farmed. Eat less of these.

Potatoes? Grow stupid easily in all sorts of conditions. Go nuts.