Briefly describe a desalination process.

Question

What can make desalination expensive?

Name 2 renewable energy sources that can be used in desalination.

Help me please and thankyou =)

Answer 1

http://en.wikipedia.org/wiki/Desalination

http://www.renewableenergyworld.com/rea/news/article/2013/09/renewables-based-desalination-a-solution-to-menas-water-crisis