Chesapeake Bay Sprawl Study: What is at stake and what to do

By Leon Kolankiewicz

Without immigration-reduction, population growth and sprawl will continue to drive biodiversity losses and degrade Chesapeake Bay’s water quality, commercial fisheries, and overall ecological health.

Mass Immigration Is Pushing Right Whales Toward Extinction

By Henry Barbaro

The right whale is struggling to survive because of ongoing ship strikes and entanglement in fishing gear. With only about 380 left, right whales are one of the most endangered animals on Earth.

Overloading Chesapeake Bay: Population Growth Stresses America’s Largest Estuary

By Leon Kolankiewicz

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.

California, We Hate to Say We Told You So, But …

By Leon Kolankiewicz

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.

End Mass Immigration Policies in 2026

By Henry Barbaro

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.

An Overcrowded Nation Under Strain: A Year-end Roundup of U.S. Environmental News

By Philip Cafaro

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.

A Drastic Proposal to Accommodate Mass Immigration into California

By Henry Barbaro

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.

America Is More Than Just GDP

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

What Is Unsustainable Population Growth?

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