A group dedicated to saving the planet by cutting runaway population increases is raising a new and shocking issue in Washington’s bitter fight over immigration reform: Most of the nation’s population growth is from immigrants, and they are consuming resources dangerously fast. According to Negative Population Growth Inc., 80 percent of the growth in U.S. population comes from immigration, legal, illegal and among American-born children of immigrants. “With increased population, we see a direct increase in the problems our nation faces on a daily basis: pollution, over-consumption, traffic gridlock, crowded schools and hospitals, overburdened social services, unemployment, crumbling infrastructure, urban