The global carbon recycling system related with soil ecology is not well understood, and the plankton ecosystem variation in the ocean surface with the CO
2 dissolution should be studied in relation to its effect on the fishery resource. Also, the risk assessment on the ecosystem will be important for the CO
2 sequestration. And, it is another important thing that the human being social-life should be made depend on the solar energy, which would be related to the ecoengineering. These subjects should be totally discussed from the view point of the eco-engineering to minimize the uncertainty on the global warming. “Withdraw from carbon society” is an important keyword for the post Kyoto Protocol, but it is preferable to think a wider system of global environment remediation with the core of “withdraw from carbon society.” In this sense, the role of the Society of Eco-engineering in the global environment remediation is considered to become more important from now.
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