This document discusses environmental problems, their causes, and sustainability. It provides general statistics about the Earth, notes that the world population is growing at 2.5% annually, and examines environmental indicators like depleted soils, food shortages, loss of biodiversity, deforestation, polluted rivers, and increased disease. It also discusses biodiversity hotspots and defines environmental science as relating to the relationships between organisms and their environment.

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

2. A First Look (Earth Rising – Apollo 11)

3. 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

4. A Crowded World

5. World Population Growth – 2.5%

6. WHAT ARE
ENVIRONMENTAL
INDICATORS?