Global wetlands appear to contribute about 75% of natural methane emissions, relatively larger in peat-rich wetlands. Since most of the methane produced in organic soils of wetlands is oxidized within 20 cm of the water table, changing water tables can dramatically alter the role of wetlands as large source or sink. Past drainage of temperate swamps may already have reduced global emissions from these sources, and additional drainage of swamps or development of drier conditions due to global warming could cause further reductions and even add new sinks.
About 70% of the estimated 510 Mt of methane released into the atmosphere each year comes from natural and human-induced surface biological processes, about 20% from the escape of natural gas from fossil fuel sources, and 10% from biomass burning.
The Encyclopedia of World Problems and Human Potential is a unique, experimental research work of the Union of International Associations. It is currently published as a searchable online platform with profiles of world problems, action strategies, and human values that are interlinked in novel and innovative ways. These connections are based on a range of relationships such as broader and narrower scope, aggravation, relatedness and more. By concentrating on these links and relationships, the Encyclopedia is uniquely positioned to bring focus to the complex and expansive sphere of global issues and their interconnected nature.
The initial content for the Encyclopedia was seeded from UIA’s Yearbook of International Organizations. UIA’s decades of collected data on the enormous variety of association life provided a broad initial perspective on the myriad problems of humanity. Recognizing that international associations are generally confronting world problems and developing action strategies based on particular values, the initial content was based on the descriptions, aims, titles and profiles of international associations.
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