ENV200H1 Lecture Notes - Lecture 5: Zero Population Growth, Gross National Income, The Boy Who Cried Wolf
Document Summary
Zero population growth birth rate = death rate end of 21st century. If we have very consumerist lifestyles, then the earth will not be able to support the growing population. If we have 4 billion people high-living for everyone earth can support. If we have 16 billion people we have to focus only on our needs and not wants for. Possible to change lifestyle and live more sustainability human ingenuity light bulbs going from incandescent to led. If everyone moves to a sustainable lifestyle, then the earth carrying capacity can increase. High gni ppp (gross national income, purchasing power parity) canada: k, global k, china k, ethiopia k. Countries move from high birth and death rates to low birth and death rates. Preindustrial high birth rate, but high infant mortality, so population grows slowly. Transitional lower death rate from better health care, food and water sources, but birth rate is still high, so population grows rapidly.
