Changes

* Prices of a barrel of [[crude oil]] and hence the price of [[gasoline]] and [[diesel]]

* Prices of a barrel of [[crude oil]] and hence the price of [[gasoline]] and [[diesel]]

* [[Man-made disaster]]s such as [[war]] and [[terrorism]]

* [[Man-made disaster]]s such as [[war]] and [[terrorism]]

* [[natural disaster]]s such as [[storm]]s, [[tornado]]s, [[hurricane]]s, [[earthquake]]s, etc.<ref>[http://www.amazon.com/Christopher-Steiner/e/B001UO7HUG/ref=dp_byline_cont_pop_book_1 Christopher Steiner], ''20 Per Gallon: How the Inevitable Rise in the Price of Gasoline Will Change Our Lives for the Better'', http://www.amazon.com/20-Per-Gallon-Inevitable-Gasoline/dp/B0046LUJCS Accessed December 15, 2014</ref>

* [[Natural disaster]]s such as [[storm]]s, [[tornado]]s, [[hurricane]]s, [[earthquake]]s, etc.<ref>[http://www.amazon.com/Christopher-Steiner/e/B001UO7HUG/ref=dp_byline_cont_pop_book_1 Christopher Steiner], ''20 Per Gallon: How the Inevitable Rise in the Price of Gasoline Will Change Our Lives for the Better'', http://www.amazon.com/20-Per-Gallon-Inevitable-Gasoline/dp/B0046LUJCS Accessed December 15, 2014</ref>

==See Also==

==See Also==