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Planting trees and proper waste disposal refers to two consecutive measures for land resources.
land and resources
sustainable use of resources
Motors are protected in two ways. Against a short circuit by fuses or breakers. Against overload by thermal overload heaters.
to make jobs to live
pollution
floods and drouts
abrasion and impact
abrasion and impact
Economic resources are classified into two categories. These are natural resources (land), and human-made resources which (capital, enterprise and labor.)
Land and gold
They knew the land, and knew where to find resources.