Sequestering carbon dioxide has been proposed as a method for combatting Global Warming. That is removing Carbon Dioxide from the atmosphere or never allowing it to escape into the atmosphere. This is done by sealing the Carbon Dioxide away somewhere; Deep Ocean Trenches, underneath Salt Domes in oilfields or chemically combining the Carbon so it is not available to form Carbon Dioxide.

This Poll has four choices, explain the reasoning behind your choice.

P.S. It is a trick question.