El libro Top Notch 3B - Unidad 10 - Lección 4

the physical and mental strength required for activity, work, etc.

the natural world around us where people, animals, and plants live

a change in water, air, etc. that makes it harmful or dangerous

a permanent change in global or regional climate patterns, including temperature, wind, and rainfall

the energy that is obtained through different means, such as electrical or solar, to operate different equipment or machines

describing a contract, agreement, etc. that can be continued for a further period of time

(of a system or machine) achieving maximum productivity without wasting much time, effort, or money

to become larger in amount or size

a rise in something's amount, degree, size, etc.

to become less in amount, size, or degree