It doesn't. Increasing temperature adds energy.

It doesn't. Increasing speed affects the KINETIC energy.

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Increasing the speed will increase the KINETIC energy, not the potential energy. Of course, the potential energy may eventually be converted into kinetic energy, for example if the object moves upwards.

Energy usage is increasing because more and more people are using energy. This could be due to the growing population, technology that requires more energy, or perhaps a society that is used to wasting energy.