Из первого абзаца выпишите прилагательное в одной из степеней сравнения. Укажите три степени сравнения данного прилагательного и переведите его.
1. In the future the energy of the sun, wind, sea and the heat of under-ground waters will be used on a large scale. These are the so-called “free” energy sources. They will be utilized only when they are more profitable than the traditional ones, because their exploitation is usually much more expensive than energy supply from large electric power stations which run on coal or nu-clear fuel.