Why should we think about energy?

Energy is necessary for our society and civilization. Energy is being consumed at a rapid rate, on average 1,460 watts per day per person, in the USA according to the U.S. Energy Information Administration (http://www.eia.gov/cfapps/ipdbproject/iedindex3.cfm?tid=2&pid=2&aid=2&cid=AS,CA,CH,FR,GM,IN,JA,RS,UK,US,ww,&syid=2004&eyid=2008&unit=BKWH). The concern we should have is that the high consumption needs are being met using nonrenewable resources. Wikipedia claims that about 19% of the global energy production is produced from renewable energy resources, leaving over eighty percent of the energy to be produced with nonrenewable matter. In Professor Udaykumar's lecture he stated that with the current use of petroleum the supply would only last another 100 years, which that is roughly 35% of our energy consumption. So, the end is relatively near for the consumption of fossil fuels and other resources that are not renewable, and since we use these products to create energy we should be concerned that these methods of energy production will not be around in a foreseeable future.