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

Try it yourself! (Answers)

The world is heavily dependent on oil for energy, which is unsustainable due 

to global warming.  What future resource do you think will take oil’s place?  

Why do you think this?

Most would agree that oil will not remain the world’s main energy source indefinitely.  

With major breakthroughs in humanity’s ability to harvest power from the sun, it is 

argued that solar power will one day become a cheaper and healthier alternative to 

petrol.  This will be shown viable by looking at how the price of solar energy per watt 

has almost decreased to that of oil and how companies producing solar technology