These are areas where people lack the money to clean up the environment, or where they aren't granted control over their environments. When we have more people in the world, and especially if they're living in a political system that grants them freedom, we see greater wealth, better health, and a cleaner environment. Ultimately, if we're looking at the population size alone, we're asking the wrong question. We find that the wealthier a nation becomes, the lower its birthrate gets. Were it not for immigration, the population of the United States and of Western Europe would be falling.
Pagans learn to look behind the surface reality, and see the truth that escapes the casual glance.
We know that magic is not supernatural, but the result of a deeper understanding of nature. When people tell us that magic doesn't exist, we know that they haven't seen past the surface of what they consider to be reality. This is the mindset we need to bring to our study of all of life, not just our magical studies. We need to examine the whole Wheel of life, and not just the little piece that happens to be under our noses, or the little piece that an advocate of a particular view wants to show us. We need to look past the superficial appearances to see the true value of any steps they're taking to save resources.