Gradually Abrupt

So we’re realizing that our species needs copious quantities of energy to sustain our technical wonders. How do we know? Well, even with all the recent research and reports on warming climate and species extinction, we’ve still increased our energy consumption by 50% since year 2000. Though renewable energy sources exist, their contributions remain trivial compared to the energy we extract from burning fossil fuels. If we maintain this trend then by year 2100, our consumption will increase by over 250%. Our consumption; mostly for our technology.

There is a desire, even an expectation, that energy reserves remain sufficient and that no actual harm will come to our ecosystem. This desire allows us to continue to burn oil, coal and biomass. If our expectation is met, then we are on a path of continual, immediate rewards. And we need care little about consequences.

Imagine if we are wrong. Let’s say that the energy reserves empty abruptly. And let’s say that the climate becomes unpredictable, and the weather varies enough to make living difficult. And let’s say that a homogeneous ecosystem covers the Earth’s surface, with the remaining species being overly susceptible to disease. Given these, will our species realize that our technical wonders do not provide the desired lifestyles?
Redwing Blackbird

Land Use

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?

Land Use – All within 1km