A country with an enormous human population can not be expected to keep large regions free of people. More places must become human habitat, as the planet naturally grows denser with people.
As a pro-lifer, I am very much for a greater spread of human life, and a much stronger flow of babies into the world.
I have long been for human population accommodation only, and absolutely no effort to "limit" nor "control" our burgeoning numbers. Each and every human life is of immense value and sacred. The more the human race can manage to blossom its huge numbers, the more people there are around to benefit.
Population increase does justify environmental changes. A higher population means more resources are needed and probably more pollution is being produced. Both of these things will cause environmental changes over time. It is our responsibility to try to help and preserve the environment, but we do also have to make sure the population is supported.
Does population increase justify environmental damages? The answer is a resounding "No." It is understandable that more people put more strain on the environment. But the bigger the population the more it needs a healthy environment in order to thrive. Poisoned air, poisoned water, contaminated food, ruined by industry supporting the burgeoning populace are not going to be able to support that populace. Therefore it is a prime concern as our numbers increase, to protect the environment. With so many people and few clean places in the world to harbor them it is an emergency. Pollutions by carbon, sulfur, and other substances must be brought under control. Agriculture must stop contaminating our food and earth with products that do harm. Round Up must be shelved, for instance, before it buries us. And attention to the control of the population must also be on the table. An ailing planet cannot be expected to sustain a astronomically increasing hoard.