Basic concepts

· The environment is the combination of external conditions - physical, social, cultural - that surround us.

· The basic natural resources are air, water, agriculturally productive land, forests, human power and energy.

· When all of the natural resources are being used within their limits and protected to ensure that present and future needs are met, this is called a balance of nature.

· Rapid population growth can disturb the balance of nature and have negative effects on natural resources and their capacity for sustained agricultural production.

· Everyone should help to protect the environment.