Human Population Explosion
In Chapter 24, you learned that the world's population is growing exponentially. At the U.S. Census Bureau web site, click on "Current U.S. Population Count" for the current human population of the U.S. and of the world. Use one of the dynamic buttons to
Visit the POPClocks web site
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Global Warming: Causes and Solutions
In Chapter 24, you have been learning about causes of global warming, and some possible solutions. At this web site, estimate your personal carbon dioxide emissions and the number of trees needed to remove that carbon dioxide from the atmosphere.
Visit the Climate Change Calculator web site
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