This is absolutely false if you live north of the poverty line and are educated and wealthy (by world standards), which if you're commenting here, you probably are.
Have kids or not, but don't delude yourself into thinking that it's bad. Rich people not having kids is literally the worst thing you can do with regards to children-based decisions on the effect of the state of the world.
The West hasn't really grappled with this question yet, but give it 15 years - when climate breakdown starts seriously affecting quality of life - and I expect the birthrate to crash.
Suffer from what exactly? In my family, half of my father's siblings and cousins died from war and hunger, the rest also had to hide from constant bombing and assaults, in fact my grandmother's village was wiped completely from the map. Yet they have tried their best to build the country so that now I can type this comment, safe from any kinds of harm. I consider it is my duty to do the same for the next generation. IMO the society should support families with kids more, as they are nurturing the future of mankind, literally.
Now we live with the threat of server climate change, that many people believe is likely to lead to war, famine, and infectious disease.