What are two ways a population can grow even if the birth rate declines?

Population growth refers to change in the size of a population—which can be either positive or negative—over time, depending on the balance of births and deaths. If there are many deaths, the world's population will grow very slowly or can even decline. Population growth is measured in both absolute and relative terms. Absolute growth is the difference in numbers between a population over time; for example, in 1950 the world's population was 4 billion, and in 2000 it was 6 billion, a growth of 2 billion. Relative growth is usually expressed as a rate or a percentage; for example, in 2000 the rate of global population growth was 1.4 percent (or 14 per 1,000). For every 1,000 people in the world, 14 more are being added per year.

Habitat destruction has been linked to the loss of many species. Which of the biomes or ecosystems do you feel is most fragile and endanger? Why?

One of the most endangered ecosystems on the planet continues to vanish at record rates due to lack of protection. Native prairie losses continue to mount as grain prices and demands for biofuels make the expensive conversion to cropland profitable, despite the costs to waterfowl, wildlife, and the American taxpayer.