I guess that is what you were talking about in your post to me, the crises we face, so I will address it here.
Overpopulation is because people continue to have too many children, more than the world's resources can support, and so we have to ask the reason why they have so many children. Maybe in third world countries it is out of ignorance, or maybe it is selfish because they want more children just because they like children, or to help take care of them, or maybe they wanted sex and had no way to prevent pregnancies. But of the problem was going to be solved it would have to be a spiritual solution as well as a political one. First they would have to less selfish, which is the spiritual solution, but education is also important. Baha'u'llah stressed the importance of education and called for universal education
“Man is the supreme Talisman. Lack of a proper education hath, however, deprived him of that which he doth inherently possess. Through a word proceeding out of the mouth of God he was called into being; by one word more he was guided to recognize the Source of his education; by yet another word his station and destiny were safeguarded. The Great Being saith: Regard man as a mine rich in gems of inestimable value. Education can, alone, cause it to reveal its treasures, and enable mankind to benefit therefrom.” Gleanings, pp. 259-260
Over-consumption is definitely a spiritual problem because it is caused by materialism which was addressed by Baha'u'llah. Overly materialistic people, people who want more than they need, lack spiritual values, so unless people change their values, what they live for and consider important, unless they start to care more about other people rather than just themselves and their own family, this won't change. The Christian beliefs of love your neighbor as yourself is not going to change this. Baha'u'llah said we are to prefer our brother to ourselves and that is a much higher standard, one that is needed if we are going to change the world.
Climate change has to be handled by scientists, but climate change is related to materialism because over-consumption has been instrumental in accelerating climate change.
Destruction of the natural world also has to be handled by scientists and politicians but it is also a spiritual problem, again related to materialism and selfishness.
All these are complex problems that are not going to be solved overnight, but we have to start somewhere, and awareness is the first place to start. Then plans need to be put in place. Much of this involves governments, so it is outside the domain of religion. However, since it is people who run the governments, if people change and are more spiritual and less selfish, then the governments will reflect those values.