The map shows how common lawns are across the country, despite a wide variability of climate and soils. Indeed, the scientists who produced the map estimate that more surface area is devoted to lawns than to any other single irrigated crop in the country. For example, lawns appear to cover more than three times the number of acres that irrigated corn covers.
The site goes on to explain how converting natural landscapes to “human-tailored” ones dramatically changes both water and carbon cycles. The entire Earth Observatory site has great imagery and articles, enough to fill an entire afternoon “researching.”