The process or industry of obtaining ore or coal by open-pit mining.

The rotation of crops in a field from one period of time to the next.

A large increase in crop production in developing countries achieved by the use of fertilizers, pesticides, and high-yield crop varieties.

Passing a law to set limits for fishermen.

A method of irrigation conducted by creating small parallel channels along the field length in the direction of predominant slope.

A measure of how much land and water area a human population needs to produce the resources it consumes and to absorb its waste.

Organisms whose genetic material has been altered using genetic engineering techniques.