World population is still growing. It seems ironic you are casting aspersions towards people desperately trying to fight climate change, when you are desperately worried about population decline, when it isn't declining.
It IS declining in western countries though, which is where all the “stop having children, you’re killing the earth!” propaganda is concentrated. ALL the population growth is happening in Africa and parts of Asia, that’s it. But curiously, no one is chiding poor Africans for having so many children.