I nte r nati o nal e n g LI s h lan g uag e testi n g syste m

have specialized their skill.

Firstly, the power of energy produced by oil is almost equal to that of energy pro-

duced by solar wafers.  For example, a recent study published in Scientific America 

magazine predicted that the rising price of oil energy and the falling price of solar 

energy would meet in 2020.  What this means is that from 2020 onwards, it would 

be more economical for a person to fuel their car using solar energy than it would us-

ing oil.  As people are driven by price, it is clear how solar energy will take the place