4th Grade Ch. 4 Lesson 4 How do people disturb the balance

Ch. 4Lesson 4

Ch. 4 Lesson 4

How do people disturb the balance?

ways peopleaffect

environment

clear prairies to

plant cropsor

build roads

automobiles factories

People clear prairies to plant crops.

lichens• sensitive to air pollution• good indicators of air quality

hazardous waste• substance

that is very harmful to humans & other organisms

OIL

giant earthmovingequipment is

usedto dig a huge

pit

reclaiming• mining companies must replace rock and soil that were removed

Built on a reclaimed surface mine, Hazard ARH Regional Medical Center is one of many developments that have made use of land leveled by mining.

National Parks

preserve:

nature’s beauty

historic sights

habitats of plants &animals

1st Nat. Park= Yellowstone

National Park

Yellowstone National Park

Yellowstone National Park

Yellowstone National Park

Saguaro National Park

Saguaro National Park

Okefenokee National Park

Okefenokee National Park

Everglades National Park

Everglades National Park