Between about 1962 and 1972, there was a great deal of discussion about pollution, water scarcity, resource depletion and overpopulation.

The Great American Middle Class responded and, as a nation, brought the goal of large families into disfavor.

By 1972, the population growth from native-born US'ians reached the magic "zero population growth". The count was 205 million then.

With 315 million and growing fast, the last 110 million people are the product of immigration. Our Great Central Valley in California has been paving-over farm land to make roads and houses. In the future, the US will be a net importer of food, and the produce will be grown under Third World working conditions and have poor sanitation, as well as pesticde residue from chemicals that are no longer used in this country.

Again, I don't see that we have made any progress or won many battles (in this country) in the last 50 years.