Between 1990 and 2020, the amount of U.S. land converted to human-made surfaces grew from about 133,000 square miles to more than 187,000 square miles. Colcom Foundation cites those figures to explain what it considers the main driver of habitat loss in the country.
Sprawl, Farms, and Infrastructure
The Pittsburgh-based foundation identifies population-driven land conversion as the primary mechanism. That category covers urban sprawl, agricultural expansion, and infrastructure development. New subdivisions, roads, and fields take space that once supported wildlife. The Foundation cites the WWF Living Planet Report 2022, which documented a 69 percent decline in global vertebrate populations since 1970.
Two studies anchor the argument. Kolankiewicz and colleagues reported in 2022 that areas with fast-growing populations experienced consistently higher rates of habitat loss. Radeloff and colleagues, writing in 2010, documented that housing growth near protected areas is the primary conservation threat to those areas.
The page frames this loss as cumulative. Land converted to pavement, rooftops, and other human-made surfaces rarely returns to its earlier state, so each decade of growth adds to the total footprint. Over the thirty years cited, the converted area expanded by more than 54,000 square miles, a gain of roughly 40 percent. Colcom Foundation presents this as one of the clearest measures of how population pressure reshapes the American countryside.
The Bigger Picture
The Colcom Foundation situates habitat loss within a broader pattern. Its resource page notes that North American bird populations dropped by 2.9 billion between 1970 and 2020, while the U.S. human population increased by 127 million. Wild vertebrate populations broadly halved over a period when the human population doubled.
These trends inform the Foundation’s reliance on the I = P x A x T equation. The framework treats environmental impact as the combined result of population, per capita consumption, and technological efficiency. Colcom argues that improvements in consumption and technology, while valuable, cannot deliver their full environmental benefit if population growth keeps expanding the human footprint.
The late Cordelia S. May set up the organization in 1996. Today it pays for public education and research nationally, along with conservation and cultural work in southwestern Pennsylvania. See related link for more information.
More about Colcom Foundation on https://www.causeiq.com/organizations/colcom-foundation,311479839/
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Between 1990 and 2020, the amount of U.S. land converted to human-made surfaces grew from about 133,000 square miles to more than 187,000 square miles. Colcom Foundation cites those figures to explain what it considers the main driver of habitat loss in the country.
Sprawl, Farms, and Infrastructure
The Pittsburgh-based foundation identifies population-driven land conversion as the primary mechanism. That category covers urban sprawl, agricultural expansion, and infrastructure development. New subdivisions, roads, and fields take space that once supported wildlife. The Foundation cites the WWF Living Planet Report 2022, which documented a 69 percent decline in global vertebrate populations since 1970.
Two studies anchor the argument. Kolankiewicz and colleagues reported in 2022 that areas with fast-growing populations experienced consistently higher rates of habitat loss. Radeloff and colleagues, writing in 2010, documented that housing growth near protected areas is the primary conservation threat to those areas.
The page frames this loss as cumulative. Land converted to pavement, rooftops, and other human-made surfaces rarely returns to its earlier state, so each decade of growth adds to the total footprint. Over the thirty years cited, the converted area expanded by more than 54,000 square miles, a gain of roughly 40 percent. Colcom Foundation presents this as one of the clearest measures of how population pressure reshapes the American countryside.
The Bigger Picture
The Colcom Foundation situates habitat loss within a broader pattern. Its resource page notes that North American bird populations dropped by 2.9 billion between 1970 and 2020, while the U.S. human population increased by 127 million. Wild vertebrate populations broadly halved over a period when the human population doubled.
These trends inform the Foundation’s reliance on the I = P x A x T equation. The framework treats environmental impact as the combined result of population, per capita consumption, and technological efficiency. Colcom argues that improvements in consumption and technology, while valuable, cannot deliver their full environmental benefit if population growth keeps expanding the human footprint.
The late Cordelia S. May set up the organization in 1996. Today it pays for public education and research nationally, along with conservation and cultural work in southwestern Pennsylvania. See related link for more information.
More about Colcom Foundation on https://www.causeiq.com/organizations/colcom-foundation,311479839/