Urban areas contain over 50% of the world’s population but cover just
1.5% of the Earth’s land area.

Although urban areas account for just 1.5% of the Earth's land area, they
contain over 50% of the world's population. Much of Earth's population
growth also occurs in urban areas: 54% in 2014, which is up from 34% in
1960. Earth has approximately 37 billion acres of land, with nearly 8
billion acres of that land being arable (land capable of being used to grow
crops). If by 2050 the world's population reaches the predicted 9 billion,
there would be enough land on Earth for every individual to have 4 acres to
themselves.