4th grade ch. 4 lesson 4 how do people disturb the balance
Post on 15-Dec-2014
2.587 Views
Preview:
DESCRIPTION
TRANSCRIPT
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
top related