ENVIRONMENTAL PROBLEMS,
THEIR CAUSES, AND
SUSTAINABILITY
The Walker School
Environmental Science
Mr. Thomas Cooper

A First Look (Earth Rising – Apollo 11)

General Earth Statistics
 Average distance from Sun:
149.6 million km
 Revolution Period: 365.26
days
 Rotation Period: 23 hours 56
minutes, 4 seconds
 Rotational Speed 1,057
mi/hr
 Axis Inclination: 23°27„
 Equatorial Diameter: 12.756
km
 Average Temperature: 22 °C

A Crowded World

World Population Growth – 2.5%

WHAT ARE
ENVIRONMENTAL
INDICATORS?