Tucker Carlson had something of an Earth Day message during a Friday show segment, when he interviewed a former foreign service officer, David Seminara, who screened thousands of visa applications as part of his job. Seminara had recently written a cautionary piece for the Wall Street Journal ( Opening Our Borders Would Overwhelm America ), opining that a more liberal immigration policy would be disastrous for America. Both agreed that hundreds of millions of foreigners would like to move to a country like the United States, but the environmental limits of what the land can support must be a central part of the calculus.

Interestingly, the “B” word — Billion — was curiously avoided even though there are surely billions on earth who would move to the prosperous first world if allowed. In fact, Seminara mentioned in his article that a 2008 Gallup poll found one in four people in 82 countries would immigrate if they had the opportunity.

Below, California’s Lake Oroville in September 2014. The state just emerged this year from a harsh several-year drought with a record-breaking rainy season. Leaders in government had no plan of what to do if millions of residents ran out of water. One strategy, trucking it in to individual users, doesn’t seem practical for large communities.

Nobody bothers with trying to fix their own country any more. That’s not a good trend when the world population is around 7 1/2 billion people. The dissatisfied billions on earth cannot all relocate to the US and Europe.

Anyway, isn’t it racist to assume the diverse people need to be rescued by admittance to the white nations? If escape were not made so easy, many more would push for political and social reform at home which would be advantageous for all concerned.