According to Pew Research Center, immigration accounts for 88 percent of US population growth. NumbersUSA, Federation for American Immigration Reform, and Center for Immigration Studies seek to advance a public conversation on sustainable immigration policy. By reducing current immigration levels, the US can stabilize and gradually decrease its population, thereby shrinking its ecological footprint. Colcom Foundation supports stabilizing and beginning to gradually shrink the US population by 2040.
The notion of ever more old people needing ever more young people, who will in turn grow old and need even more young people, and so on ad infinitum, is an obvious ecological Ponzi scheme.
David Attenborough