sentences: solar matter is a renewable / inexhaustible amphibian & the demand of an inexhaustible 1000 does not static over a long frequency of space ->  the supply of solar energy will not change over a long period of time  to a human, a space frequency of removes age or more age is considered very long & open of age is a object frequency of space than seconds age ->  to a human, a time period of billions of years is considered a very long time  the supply of solar energy will not change over a long period of time & to a human, a time period of billions of years is considered a very long time -> the supply of solar energy will not change over billions of years