Curbing population growth will not help the urgent measures we need in order to curb global heating in this decade. Reducing the birth rate won't make a big difference in just a few years.

However, if we do enough in this decade to win a chance for civilization's future, the task of preventing global disaster will not be finished. That will take decades. During that time, reducing the birth rate will make a difference — especially when it comes to returning large amounts of land to the wild and reducing total consumption of natural resources.