human population growth

description

• pop. of humans grows 1.2% annually
• about 81 million a year
• 11 million by the end of the century

natural or anthropogenic

• both
• naturally reproduce
• ways to regulate

causes

• births
• deaths
• immigration
• emigration

effects on biosphere

• negative and positive
• air and water pollution
• farming

possible solutions

• regulate number of births
• allow abortion
• enforce birth control