Let's face it, we are at a point where Earth's resources can no longer sustain our current rate of animal dependency regarding nourishment. Animal-based food is verified to consume substancially more resources - the ever so precious water, namely - in its production stages as opposed to plant-based. In this day and age, it is no longer a matter of a few imposing views on a majority, rather an urgent call for a change in habits if we indeed wish to preserve our planet for future generations.
A great deal of people have changed or are changing their views reagarding what they eat, others have extended the change to their children with surprising results.
Implementing a dietary plan of vegan/vegetarian diets on school menus at a global scale can open minds and show children/teenagers that an animal is indeed a sentient being who experiences pain and suffering just as a person would.
As such, we can instil an awareness of respect towards non-human creatures, as well as reach a higher education towards environmental issues from a young age. Plus, we would be ensuring that children experience a healthy growth while making them see that "green IS good".