<your name>
<your return address>
<your city, state and zip>

<recipient’s name>
<recipient’s address>
<recipient’s city, state, and zip code>

<date>

Dear <recipient>,

The transportation of crude oil from one country to another has been essential for the global economy for decades. Shipping crude oil is the most economical and flexible way of transporting crude oil in bulk (DHTankers, 2008).  For theses reasons huge tanker ships are ideal to perform this task but at what environmental cost.  When these massive ships are damaged, an immense amount of oil is spilled into the ocean devastating the life and quality of the surrounding area. Oil spills have consistently occurred throughout the past few decades with no real advances in oil protection technology, although there have been some new ideas aimed at enhancing the protection of crude oil. One idea is the double hulled tanker, which was introduced in the 1990’s.  
Traditionally, tankers only have only one hull to protect the oil.  With the introduction of a second hull, the oil will be much better protected. The addition of a second hull would absorb most of the impact during a collision, protecting both the oil on the inside, and the environment on the outside. These hulls are made from lightweight steel which is cheap, giving even more incentive to this idea. These hulls are four meters in diameter, wide enough to withstand a major collision (DHTankers, 2008).  Double Hull Tankers are a shipping company that transports crude oil all over the globe using nine of these double hulled vessels.  This double hulled technology has been a great success, but single hulled oil tankers are still moving transporting this crude oil as you read this.  According to the Double Hull Tankers Company, single hull tankers may be outlawed within ten years.  
This is a step in the right direction, but why postpone the safety of our environment and our oil.  Massive oil spills can occur at any time and without warning.  The sooner all crude oil transporters are equipped with the safest technology the better.  Most companies have already started using these tankers, but one that has not is ExxonMobil, one of the most notorious oil companies in the world.  I urge you to share  your opinions and thoughts with me and the ExxonMobil Company.  

Sincerely,                                                                                                                          <Sign Name here>
<your name>
Double Hull Tankers (DHTankers), 2008. Tanker Industry. Retrieved on April 29, 2008 from  http://www.dhtankers.com/phoenix.zhtml?c=194185&p=irol-tankerIndustry.