how are countries exploiting other energy sources?

Subdecks (3)

why are fossil fuels still extracted and used? 
they are cheaper and we have the technology to extract
what are unconventional fossil fuels?  
refers to crude oil that is obtained through other methods, different form the normal vertical well extraction
examples of unconventional fossil fuels 
-fracking
-deep sea oil
-tar sands
how have humans managed to exploit unconventional fossil fuels? 
better technology leads to an increased understanding of oil under the oceans
facilitating removal of oil and gas from more stores