LEARNING FROM THE PAST

The Agricultural Revolution (began 10,000-12,000 years ago)

The Industrial-Medical Revolution (began about 275 years ago)

The Information and Globalization Revolution (began about 50 years ago)

More energy and new technologies.

Expansion of the human population.

Increased resource use, pollution, and environmental degradation.

Survived by collecting edible wild plants, hunting, fishing, and scavenging meat killed by predators.

Lived in small groups, worked together.Moved seasonally to find food.Populations grew slowly due to high infant

mortality and short life span.Advanced H-G had greater environmental

impact- they used more advanced tools and fire to convert forest into grasslands . May have contributed to the extinction of some animals and altered the distribution of plants.

Their environmental impact was limited and local because of their small population, low resource use per person, migration, and lack of technology.

Move from hunting and gathering to settled agricultural communities- domesticated wild animals and plants.

Slash-and-burn cultivation.Shifting cultivation.Sustainable cultivation.Small impact on the environment- small plots,

population size and density was low.

Shift to a dependence on machines running on nonrenewable fossil fuels.

Large-scale production of machine-made goods in factories.

Factory towns grew into cities as rural people came into factories to work.

Fossil-fuel powered farm machinery.Larger and more reliable food supply and longer

life spans contributed to the increase in the population.

Increase in air and water pollution and waste production.

Higher standard of living.Soil depletion and degradation.Groundwater depletion.

Using new technologies for gaining rapid access to more information on a global scale.

These technologies include the telephone, radio, television, computers, internet, automated databases, and remote-sensing satellites.

Ability to respond to environmental problems more effectively and rapidly.

Information overload can cause a sense of confusion and hopelessness.

TribalFrontierConservationEnvironmental

N. America was occupied by Native Americans for at least 10,000 years.

Practiced hunting and gathering, burned and cleared fields, and planted crops.

Had deep respect for the land and its animals.

Had little environmental impact.

1607-1890European settlers began settling N. America.Viewed most of the continent as having

inexhaustible resources.European settlers conquered Native

Americans and spread across the continent. The transfer of public lands to private

interests accelerated the settling of the continent.

1832-1960Some became alarmed at the scope of resource

depletion and degradation in the US.Urged that part of the unspoiled wilderness on

public lands be protected as a legacy to future generations.

Henry David Thoreau and George Perkins Marsh were early conservationists that led the movement.

Forest Reserve Act of 1891- helped to establish the responsibility of the federal govt. for protecting public lands from resource exploitation.

1892-John Muir established Sierra Club (preservationist movement that called for protecting

CONSERVATION ERA (cont.)Large areas of wilderness on public lands from

human exploitation.1901- Theodore Roosevelt, an ardent

conservationist, became president. His term became known as the Golden Age of Conservation.

T. Roosevelt established wildlife reserves and more than tripled the size of the national forest reserves.

1905- Congress created the US Forest Service to manage and protect the forest reserves.

1906- Congress passed the Antiquities Act, which allows the president to protect areas of scientific or historical interests on federal lands.

CONSERVATION ERA (cont.)1916- Congress passed the National Park

Service Act, which declared that parks are to be maintained in a manner that leaves them unimpared for future generations.

Early 1930’s- President Franklin D. Roosevelt persuaded Congress to enact federal govt. programs to provide jobs and restore the country’s degraded environment.

ENVIRONMENTAL ERA1960-2004Rachel Carson and her book Silent Spring are

credited with beginning the modern environmentalist movement in the US.

1964- Congress passed the Wilderness Act, authorizing the govt. to protect undeveloped tracts of public land . Land in this system is to be used only for nondestructive forms of recreation such as hiking and camping.

During that period, several events increased public awareness of pollution.

1970- First annual Earth Day

ENVIRONMENTAL ERA (cont.)1970- Richard Nixon established the

Environmental Protection Agency (EPA) and supported the Endangered Species Act of 1973.

1977-1981- Jimmy Carter persuaded Congress to create the Dept. of Energy to develop a long-range strategy to reduce the country’s heavy dependence on imported oil.

1981- Ronald Reagan became president. Reagan cut federal spending for research on energy conservation and renewable energy resources, lowered automobile gas mileage standards, and relaxed federal air and water quality pollution standards.

ENVIRONMENTAL ERA (cont.)1989- George H. W. Bush received criticism

from environmentalists for not providing leadership on key environmental issues and continuing support of exploitation of valuable resources.

1993- Bill Clinton appointed respected environ-mentalists to key positions, vetoed most of the anti-environmental bills, and protected more public land as national mouments in the lower 48 states than any other president.

2001- George W. Bush did not consult environmental groups, weakened protections on public lands, and developed an energy policy that placed great emphasis on use of fossil fuels and nuclear energy.

ENVIRONMENTAL ERA (cont.)Aldo Leopold- strong proponent of Land

Ethics, a philosophy in which humans as part of nature have an ethical responsibility to preserve wild nature. One of the founders of conservation and environmental movements of the 20th century.