A new UN report says so-called "megacities" are continuing to grow as our planet becomes increasingly urbanized.

Indonesia's capital is home to almost 42 million people, according to a new United Nati estimate.

Cities account for 45 percent of the world's population, more than double the share in 1950.

The last time the U.N. released its "World Urbanization Prospects" report was in 2018, when Tokyo was the world's most populous city.