the combustion process will be much more efficient and there are several other advantages in terms of flue gas composition in yet another embodiment the system is feeding exhaust gases from a power plant delivered by a pipeline to a offshore site a wave powered hydraulic system is compressing and feeding the exhaust into a system as described in fig9 a wave powered hydraulic system is also pumping the water in a counter stream to the gas injection an example of a renewable energy wave air pump is in u s pat no 7 391 127 using wave energy to compress air such pumps are however designed to make renewable energy and not to catch co 2 from exhaust in yet another embodiment the entrance of a fjord is used where the fjord is a natural reservoir and the differences in pressure across the entrance can be used flue gases may also be led in pipes to a reservoir or a lake at a high altitude used for a hydro electric plant the water containing the captured gas is then fed into the pipes going down to the hydro turbine where the co 2 is released from the movement of the water.