Final answer:
The statement is false as the most densely populated megacities are now mainly in the global south, with Tokyo being the largest city by population.
Step-by-step explanation:
The statement 'Most of the megacities, with population over ten million each, can be found in Europe and North America' is false. Today, the world's most densely populated cities are largely concentrated in the global south, signifying a shift from several decades ago when the biggest cities were predominantly in the global north. With the highest urbanized regions found in North America, Latin America/the Caribbean, and Europe, it's important to note that the largest urban populations are now in cities like Tokyo, New Delhi, and others in Asia and Africa. The challenges of urbanization, especially in less developed countries, involve achieving sustainable development without environmental depletion.