Growth, whether through immigration or natural increase, is a plus for some groups. For business, it means a boost in the demand for products. It also means a surge in low- and high-skilled workers, which can keep a lid on wage pressures. Religious and ethnic groups want more immigrants of their own faith and ethnicity to raise their political and social clout. The military regards young immigrants as potential recruits. But the public pays a cost for a bigger population. Joseph Chamie, former director of the population division of the United Nations, speaks of more congestion on highways, more farmland turned into housing developments, more environmental damage, including the output of pollutants associated with climate change. Get the whole story in this article from The Christian Science Monitor.