UAE flag

                                                            

The flag of the United Arab Emirates was adopted on December 2, 1971.
It contains the Pan-Arab colors red, green, white and black, which symbolize Arabian unity.
In addition the individual colours have the following meanings:
  • Green: Fertility
  • White: Neutrality
  • Black: Oil wealth
  • Red: Unity
Merchant ships may fly the alternative civil ensign, a red flag with the national flag in the canton.

Source : http://en.wikipedia.org/wiki/Flag_of_the_United_Arab_Emirates