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Greenhouse gases such as CO2 (carbon dioxide) and CH4 (methane) will become more noticed in the future, and the populace will pressure the politicans of each nation to endorse greenhouse-gas-emission-reduction plans such as the Kyoto Protocols. Once that is accomplished, and hand-in-hand with plans for placing atmospheric carbon dioxide into carbon sinks (see Iron Seeding), the amount of greenhouse gases in the future will noticeably decline.