Bummer: After humans have increased in stature dramatically over the last 1.5 centuries, we're now told that CO2 could make us "shrink towards hobbit-like stature"

Skinny cows and climate change could cost farmers billions | RTCC Climate Change News

The implication that mammals could dwarf and humans shrink towards hobbit-like stature under a changing climate was tragically confirmed by a study of body heights among children in north-east Brazil.

In response to near-starvation conditions, children who were brought up on a diet of rats, snakes and cacti reached an average adult size of only 1.35 metres (4ft 6ins).

1998: Why are we getting taller as a species?: Scientific American

Humans increased in stature dramatically during the last 150 years