A global warming eugenics proposal

What does it take to get a liberal to favor eugenics? This article favors it to make people shorter and combat global warming:

Over the last century, our species has seen an unprecedented species - wide growth spurt — a 4-inch increase on average. The most extreme examples are in Japan, where mean height has increased 5.5 inches in the last 50 years, and in the Netherlands, where people have grown eight inches in the last 150 years. This recent uptick differs from all other height fluctuations in history: It is due, not to natural selection, but to unnatural nutritional overabundance, writes Michael J. Dougherty, now director of education at the American Society of Human Genetics. ...

Liao does argue that, “in light of the problem of climate change,” humanity should consider shrinking, ...

Liao would accomplish this height reduction through pre-implantation diagnosis, a screening test used to determine whether genetic or chromosomal disorders are present in developing embryos before they are inserted into mothers through in vitro procedures.