Aim: How have Human decisions affected habitats?

Key Idea 7

Human decisions and activities have had a profound impact on the physical and living

environment

Text Chapter 6

HumanActivities

that have changed the biosphere include

may have once caused often relies on the methods of thehave resulted in

which increased

Food supply

Pesticide use

Monocultureuse

Hunting andgathering

Agriculture Industrial growth

Urbandevelopment

Extinctions of animals

Greenrevolution High standard

of livingIncreasedpollution

Section 6-1

Concept Map

Go to Section:

Milestones in Environmental Protection

Preservation and conservation milestones in the United States

by Holly Hartman

Fish-Eating BirdsMagnification ofDDT Concentration

10,000,000

100,000

10,000

1,000,000

1

1000

LargeFish

Small Fish

Zooplankton

Producers

Water

Section 6-3

Figure 6-16 Biological Magnification of DDT

Go to Section:

Biological Magnification

Habitat Destruction

• The magnificent white beluga whales of Alaska's Cook Inlet are headed toward extinction

Global Warming and Climate Change due toincreased amounts of CO2 in the atmosphere

Smart Energy Solutions(buy energy star appliances)

Use conservation initiatives(don’t waste water, electricity,etc.)

Switch to compact fluorescent light bulbs (CFLs)

Buy green powerBuy cars that get more miles

to the gallon or hybrids

Explosion at an oil rig in the Gulf of Mexico April 20, 2010

NASA image from SPACENASA IMAGE FROM SPACE

The Earth Needs You