Raegan Science

Enviromental degradation can have severe health effects on the poor, like...

• deforestation

• malnutrition

• illness caused by limited access to adequate sanitation

• indoor air pollution

The approximate doubling time of the human population can be calculated by using the rule of 70. The rule of 70 is...

• tripling time (years) = 70 /annual growth rate (%)

• doubling time (years) = 70 / annual growth rate (%)

• decreasing time (years) = 70 / annual growth rate (%)

The current population is...

• 7 million

• 10 billion

• 7 billion

• 20 billion

An example of a cause of environmental problems is....

• Biological capacity

• Tragedy of the Commons

• Marketplace prices goods and services

• Ecological footprint

The three scientific principles of sustainability are: solar energy, biodiversity, and ______.

• ecosystem

• ecology

• environmental science

• chemical cycling

An (a)   is a biological community of organisms within a defined area of land or volume of water that interact with one another and with the nonliving chemical and physical factors in the environment.

The sun's energy warms the plant and provides energy that plants use to produce.

• chemical cycling

• solar energy

• biodiversity

The variety of genes, species, ecosystems, and ecosystem processes.

• solar energy

• biodiversity

• chemical cycling

The circulation of nutrients from the environment (mostly from soil and water) through various organisms and back to the environment.

• chemical cycling

• solar energy

• biodiversity

Materials and energy provided by nature that are essential or useful to humans.

• Biodiversity

• Natural resources

• Sustainability

• nature capital