The Earth is a rocky sphere that orbits the Sun. Via plate tectonics it recycles its surface. Currently the land portion of Earth’s surface has an area of about 148.9 million square kilometres. This is expansive. For example, the whole surface area of the Moon is only about 6% of this; just the area of Europe. So we have lots of land to use as we see fit.
Let’s consider our use of the Earth’s land surface. We know the use from satellite data that measures the area of certain types of biomass. In 2017, the FAO estimates that agriculture covered 4.83 billion hectares, that forests covered 4 billion hectares and that other land such as deserts and barrens covered 4.165 billion hectares. While these numbers are just shy of the estimated total land area, they provide a very clear division of land use.
Let’s stop and think about these values. From them we see that humans have mastered the planet’s surface. Our agricultural area exceeds the forest area. Add infrastructure area (i.e. cities) to the agricultural area and the human affect becomes noticeable greater. We have taken over! And to think that only a few thousand years ago people had neither agriculture nor cities. What does this imply about land use for the future?