A recent study found that more than half of the land on the planet has been converted to human use. While the pace of protecting land has increased, there is 25 times more land unprotected than protected. A growth curve that starts at zero and ends at 100% typically has an inflection point around the middle. After the halfway point, the remaining resource is increasingly limited, costs rise, competition for it rises, and stresses increase within the undeveloped portion and the developed portion. In the last two decades, we’ve converted 4.5 million square kilometers, and we’re not done yet. Because land is a limited resource, and because we continue to consume more of it, we do not have a sustainable system.
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