Over the past twenty-five years, NumbersUSA has published numerous scientific reports on the causes and consequences of sprawl in the United States. Our most recent study quantifies ecological decline in the Chesapeake Bay and its watershed over the past three decades. Looking forward, we explore a path toward ecological sustainability centered on stabilizing the region’s population through reduced immigration.
If federal immigration policies driving national population growth continue, California’s environment and residents’ quality of life will pay an ever higher price. There can be no sustainability in a context of ever growing human populations.
The border is secure and illegal migration is down. So, do we still need to be concerned about immigration? The answer is an emphatic yes.
Overall environmental conditions in the United States deteriorated in 2025, as the nation continued to add more people to already overburdened ecosystems. As the U.S. population reaches 345 million, the country’s environmental problems increasingly reflect a basic mismatch between human numbers and ecological capacity.
The proposed Delta Conveyance project is designed to service 5.2 million people, less than half of California’s immigrant population. If immigration levels had been lower in recent decades, the project would not be necessary.
By Eric Ruark
by Henry Barbaro There are countless pundits and politicians who proclaim that America’s population must grow, grow, grow. Otherwise, our economy will crash (e.g., not enough workers), and there won’t be enough people to support the elderly (e.g., pay into Social Security), join the military, pay taxes, or to keep housing values from falling. Census … Continued
By Eric Ruark
by Henry Barbaro One of the four pillars upon which NumbersUSA was built is the recommendations of the President’s Council on Sustainable Development, established by President Bill Clinton in 1993. In the executive summary of its final report, the Council stated that “reducing immigration levels is a necessary part of population stabilization and the drive … Continued
By Eric Ruark
International audiences who follow American media are aware that under President Joe Biden, “unprecedented migration” to the United States occurred. The term migration is wholly appropriate here in the sense that millions of people from around the world crossed the U.S. border. However, under U.S. law, these migrants were overwhelmingly inadmissible aliens – an alien … Continued
September 22nd was World Rivers Day, which is an annual global event that falls on the fourth Sunday of every September. Rivers play a vital role in our lives and the environment, and World Rivers Day serves as a rally cry to safeguard rivers for future generations while preserving the ancient web of life that … Continued
