I believe it is a myth. The density of population in certain areas is a concern. There is a plenty of uninhabited land on this Earth. Drive out any metro, or town in any country and you will see plain grounds, or pastures under nice blue skies often with no people. Maybe a cow or a pig or two but no humans. It is true even in China an India. The two most populated lands. I have not visited China yet but have driven all over India. As soon as you leave a city, within 50 miles, it is all baron land with nobody in sight. All open land.