Explain what is meant by energy and list two units in which energy is measured

Energy is a set of physics measures. Popularly the term is most often used in the context of energy as a technology: energy resources, their consumption, development, depletion, and conservation. Biologically, bodies rely on food for energy in the same sense as industry relies on fuels to continue functioning. Since economic activities such as manufacturing and transportation can be energy intensive, energy efficiency, energy dependence, energy security and price are key concerns. Increased awareness of the effects of global warming has led to international debate and action for the reduction of greenhouse gases emissions, like many previous energy use patterns it is changing not due to depletion or supply constraints but due to problems with waste, extraction or geopolitical scenarios.

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