16.1 Human Population Growth And Natural Resources KEY CONCEPT As the human population grows, the demand for Earth’s resources increases. What happened to this forest?

16.1 Human Population Growth And Natural Resources Earth’s human population continues to grow. 6,000,000,000 Earth’s human carrying capacity is unknown. English Economist Said that the human population is growing faster than the Earth’s resources can support –This will result in famine, disease, war, etc. Thomas Malthus

16.1 Human Population Growth And Natural Resources Technology has helped to increase Earth’s carrying capacity. –gas-powered farm equipment –medical advancements such as antibiotics  infant deaths/1000 births  /1000 Make a list of the technologies you used today.

16.1 Human Population Growth And Natural Resources Technology I Used Today Lap Top Coffee Maker Running Water Refrigerator Cell Phone Toilet Microwave Car Radio Lights Furnace Television Garage opener

16.1 Human Population Growth And Natural Resources The growing human population exerts pressure on Earth’s natural resources. Nonrenewable resources are used faster than they form. –coal –Oil –Natural Gas Growing use of this resource will eventually lead to an energy crisis Fun fact: In 2006, humans were using oil at a rate of about 77 million barrels per day.

16.1 Human Population Growth And Natural Resources Renewable resources cannot be used up or can replenish themselves over time. –wind –water –sunlight Growing use of nonrenewable resources may lead to a crisis. Resources must be properly managed. Explain how a renewable resource like water can become nonrenewable.

16.1 Human Population Growth And Natural Resources Drinking Water – As Renewable Resource Pollution and overuse threaten its supply –Pesticides –Industrial waste –Other contaminants In 1900, 25,000 American’s died of typhoid. By 1960, thanks to the use of chlorine in water treatment, that number dropped to 20. Found in water sources that supply tens of millions of people across the country

16.1 Human Population Growth And Natural Resources As human population grows… Fun Fact: United States uses more resources and produces more waste than any country on Earth Fun Fact: U.S. generates about 230 millions tons of garbage –4.2 pounds per day, per person, or almost 1 ton per year

16.1 Human Population Growth And Natural Resources Effective management of Earth’s resources will help meet the needs of the future. Earth’s resources must be used responsibly. Careless use of resources makes them unavailable to future generations. Sustainable Use –Crop rotation –Aquaculture –Alternative pest control Easter Island is an example of irresponsible resource use.

16.1 Human Population Growth And Natural Resources An ecological footprint is the amount of land needed to support a person. The land must produce and maintain enough –food and water –shelter –energy –waste Average American citizen’s ecological footprint covers an area large than 24 football fields. Largest in the world.

16.1 Human Population Growth And Natural Resources Several factors affect the size of the ecological footprint. –amount and efficiency of resource use –amount and toxicity of waste produced