1 / 24

Homosapien Development

Homosapien Development . During most of their 60,000-year existence, humans were hunter-gatherers. Their environmental impact was limited and local Mobile Small tribes families Covered large areas. Sustainable Higher quality of life Advanced medical knowledge. agricultural revolution.

reeves
Download Presentation

Homosapien Development

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Homosapien Development

  2. During most of their 60,000-year existence, humans were hunter-gatherers. Their environmental impact was limited and local • Mobile • Small tribes families • Covered large areas. • Sustainable • Higher quality of life • Advanced medical knowledge

  3. agricultural revolution • The agricultural revolution began 10,000 to 12,000 years ago. • Early growers relied on slash-and-burn cultivation and shifting cultivation, which had a low environmental impact. • More advanced agriculture has increased food supplies • Rotating crops • Beans-add nutrients-Corn takes nutrients • Irrigation • Animal Husbandry • Selection of docile animals

  4. slash-and-burn cultivation • Cutting down trees and other vegetation in a patch of forest, leaving the cut vegetation on the ground to dry, and then burning it. • The ashes that are left add nutrients to the nutrient-poor soils found in most tropical forest areas. Crops are planted between tree stumps. • Plots must be abandoned after a few years (typically 2&endash;5 years) because of loss of soil fertility or invasion of vegetation from the • The abandoned plot cannot successfully grow crops for 10-30 years

  5. Agriculture-raising food • Pros • More people • Know what you are going to eat • You don’t have to move • Cities, Technology, Art, Commerce • Irrigation • Cons • Susceptible to the environment • Class and race inequality • Decreased knowledge of medicine • Greater infant mortality

  6. shifting cultivation • Clearing a plot of ground in a forest, especially in tropical areas, and planting crops on it for a few years (typically 2-5 years) until the soil is depleted of nutrients or the plot has been invaded by a dense growth of vegetation from the surrounding forest. • Then a new plot is cleared and the process is repeated. • The abandoned plot cannot successfully grow crops for 10-30 years

  7. The industrial-medical revolution began in England in the mid-1700s and spread to the United States in the 1800s.

  8. industrial-medical revolution • Use of new sources of energy from fossil fuels and later from nuclear fuels, and use of new technologies, to grow food and manufacture products

  9. We are currently in the midst of a new cultural shift, the information and globalization revolution.

  10. information and globalization revolution • Use of new technologies such as the telephone, radio, television, computers, the Internet, automated databases, and remote sensing satellites to enable people to have increasingly rapid access to much more information on a global scale

  11. The Early Conservation Era (1832-1960) • Gifford Pinchot 1900 –Natural lands may have many uses. • Aldo Leopold-1900-The natural lands need to stay natural.

  12. Theodore Roosevelt • Theodore Roosevelt's term of office has been called the country's "Golden Age of Conservation." He established the first National Wildlife Refuge, created the National Forest Service, and used the 1906 Antiquities Act to protect the Grand Canyon and other areas that later became National Parks.

  13. FDR-1930s • New deal. • Created parks to generate jobs.

  14. Environmental History of the United States: The Environmental Era (1960-2004)

  15. Silent Spring • In 1962, Rachel Carson published Silent Spring, which contributed to the beginning of the modern environmental movement. The 1960s saw an increased awareness of the science of ecology.

  16. Nixon • The first annual Earth Day was held in 1970, the same year that • Richard Nixon established the Environmental Protection Agency 1970 . • Nixon also supported the passage of the Endangered Species Act of 1973.

  17. Carter • Jimmy Carter (president 1977-1981) created a Department of Energy and a Superfund to clean up hazardous waste.

  18. Reagan/Bush 1 • The administrations of Ronald Reagan and George Bush, Sr. allowed some environmental laws to be undercut and supported exploitation of resources on public lands.

  19. Clinton • During Bill Clinton's administration (1993-2001), environmentalists were appointed to key positions

  20. Al Gore 2006 • Created a movie about global warming-Has as strong effect on the population as silent spring.

More Related