He's been saying it for a while and I didn't consider it serious. Today he showed me this article. I have to say he's totally right but I'm not happy about it.
http://www.npr.org/2016/08/18/479349760/should-we-be-having-kids-in-the-age-of-climate-change?utm_source=facebook.com&utm_medium=social&utm_campaign=npr&utm_term=nprnews&utm_content=20160818
From the article:
Below are a few examples of how much carbon dioxide (in metric tons) is saved over a lifetime (80 years) by a typical American for certain actions, including not having one child.
Increase car's fuel economy from 20 to 30 mpg: 148
Reduce miles driven from 231 to 155 per week: 147
Replace single-glazed windows with energy-efficient windows: 121
Replace ten 75-watt incandescent bulbs with 25-watt energy-efficient lights: 36
Replace old refrigerator with energy-efficient model: 19
Recycle newspapers, magazines, glass, plastic, aluminum and steel cans: 17
Reduce number of children by one (with emissions fixed at 2005 per-capita values): 9,441
Source: "Reproduction and the carbon legacies of individuals" by Paul A. Murtaugh and Michael G. Schlax
What's your carbon footprint? Use the EPA's calculator to get an estimate.