2. Capturing Carbon dioxide Capturing and removing CO 2 from mobile sources is difficult. But CO 2 capture might be feasible for large stationary power plants and industrial boiler. Flue gas – Mixture of nitrogen, water vapor and 15 % of Carbon dioxide.

3. Approach to capture CO 2 React the flue gas with chemicals that absorb CO 2 and then heat the chemicals to release CO 2. Remove carbon before combustion. Gasifying the coal through the reaction with more oxygen it is possible to produce a mix of CO 2. Then CO 2 can be captured leaving H 2.

4. Approach to capture CO 2 Use pure oxygen to support the fossil fuel combustion. The flue gas is then mostly CO 2 and water making it to separate easily. NOTE: But extracting oxygen from air is very expensive and consumes energy and combustion with pure oxygen occur at higher temperature.

5. Sequestration CO 2 sequestration is the storage of carbon dioxide (usually captured from the "atmosphere") in a solid material through biological or physical processes.

6. Where to sequester CO 2 ? Inject CO 2 into deep sedimentary rock formation. The wells that produce fossil petroleum. Deep Ocean

7. Uncertainty in CCS Slow leakage would lead to climate changing. Sudden catastrophic leakage is dangerous, and causes asphyxiation. Not easy to design a well-engineered sequestration. Difficult to find truly impermeable rock. It is not a complete solution for anthropogenic CO 2 Construction of CCS is not likely to be done quickly. Energy intensive and the economic cost.