The background color on this div will only show for the length of the content. If you'd like a dividing line instead, place a border on the right side of the #mainContent div if the #mainContent div will always contain more content than the #sidebar2 div.

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The World's Oil Supply

We have been using oil for over 100 years, and the extent of the world's oil reservers on land is quite well known. The additional oil found under the oceans is less well mapped, but rapidly being understood.

H2 level heading

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