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The Delicate Balance, Part 1: Reason for Optimism
03:02

The Delicate Balance, Part 1: Reason for Optimism

Ecological refugees-people whose environment is so degraded that it no longer supports the social fabric of the country are a growing concern in every industrialized country. Many other population issues exist, but changes have been seen, too. In co...

The Delicate Balance, Part 1: Exponential Population Growth
01:35

The Delicate Balance, Part 1: Exponential Population Growth

It took thousands of years for mankind to evolve from nomadic hunter-gatherers to farmers settled in towns and villages. It took only centuries from that point until Thomas Malthus postulated, in the 18th century, that human population would grow at...

The Delicate Balance, Part 1: Demography of Population Growth
01:59

The Delicate Balance, Part 1: Demography of Population Growth

Projecting population growth begins with three basic assumptions: everyone is born at age zero, everyone dies, and the earth is a closed system. Based on current fertility patterns, the world population will reach 296 billion people by 2150, compare...