Энергетические ресурсы

What is energy.Everything in the universe is either energy or matter.For us humans, energy is the means for doing work.Picking up a book, watching TV or launching a Space Shuttle all needs energy.Without it there would be no life, for all life uses energy.In fact, Life seems to control the temperature of the planet like a thermostat.But what about oil, gas or coal, which also come from inside the Earth?These have formed 'fossil fuels' or 'non-renewable' energy sources.That ship, when built, has engines, which push it through the water.Most energy is not available to us in a usable form.