Investigating Sustainability Foltz 2013 | Page 26

extended life expectancies and reduced infant mortality rates around the globe, allowing the birth rate to outstrip the death rate in most nations.
There is a 30 years difference in life expectancies is a very big change over time. Life expectancies rising are one of the main reasons why Global Population Growth is a problem on earth.
Thomas Malthus
Life expectancies rising, making the world more and more crowded
Technological advances and modern medicine is raising life expectancies, and in a large amount of countries, it’ s“ multiplying” population. Life expectancies are as much as 30 years higher than when about 1.7 million people were living on earth.
Earth has many resources and necessities, but those could become limited by the uncontrollable multiplying. Food, water, and more can possibly be in scarce amounts in the future. In the year 1798, Thomas Malthus came up with a theory that the world’ s food supply would never keep up with surging population growth.
Malthus’ s theory may have been from the 1700’ s, but he is absolutely correct; our growing populations will have us eventually suffer from a lack of food supply. On the other hand, overpopulation also burdens the environment with increasing demands for timber and fossil fuels. The human race’ s demands for timber have caused the world’ s Deforestation; while gas prices are