trade off - a situation where you must give up one thing to gain something else. Choosing one option means losing some benefits of another., Cost-benefit analysis - a method of comparing the costs of a decision to the expected benefits, helping determine whether the choice is worth it., Sustainability - means using resources in a way that meets present needs without harming the ability of future generations to meet their own needs., Energy Efficiency - means using less energy to perform the same task. It reduces waste and often lowers costs., Environmental impact - refers to the effect an action, product, or process has on the natural environment—such as pollution, resource use, or ecosystem changes.,

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