So Kevin Feige confirmed that Thanos killed 50% of all non-sapient life too.
That's a lot of empty space from vanished trees, and it means reducing the food supply by 50% even if you're vegetarian.
Not a super-smart move there, Thanos.
...unless, of course, Feige forgot that plants are alive, like many people tend to do.
Infinity War, death
@green @noelle thanos is defeated by lack of food!