The San Diego Union-Tribune, November 28, 1997

[…] reducing U.S. emissions of greenhouse gases […] higher energy taxes, turn down our air conditioners and drive our cars less.

What has not been made clear to the American people, however, is that the amount of sacrifice Americans will have to endure depends heavily on our immigration policy. While a direct link between the emission of greenhouse gases and immigration policy may seem improbable at first, the connection is actually straightforward.[…]

[…] a larger population will require each individual to cut back more […]

To see how this works, consider the following: if the United States agrees to limit its emission of greenhouse gases to 1.6 billion metric tons annually (the 1990 level), then the average American can produce no more than 5.3 tons of greenhouse gases if our population is 298 million in 2025, as it would be with moderate levels of immigration.

However, if the U.S. population grows to 335 million in 2025, as it is projected to do if current immigration trends continue, then per-person emissions will have to be cut back to 4.7 tons per year. Thus, in the next two decades, because of high immigration, each American will have to cut back 12 percent more on his production of greenhouse gases than would otherwise have been necessary.

[…] The simple fact is high immigration will make any effort to reduce the emission of greenhouse gases more costly for the average American.

Not only does this situation have important implications for the standard of living in the United States, it may also adversely affect the competitiveness of U.S. industry.[…]

[…] immigration has the effect of transferring population from the less-polluting parts of the world to the more-polluting parts of the world.

Thus, even if the highest priority is placed on reducing the emission of greenhouse gases worldwide, immigration is still counterproductive.[…]

Reducing Greenhouse Gases: The Vital Immigration Angle — Center for Immigration Studies