The Blue Carbon Project

submitted by Joe Browder

Offsetting carbon emissions by conserving ocean vegetation

thebluecarbonproject.com

What is Blue Carbon?

The problem: The growing emission of carbon dioxide from a wide range of human activities is causing unprecedented changes to the land and sea. Identifying effective, efficient and politically acceptable approaches to reduce the atmospheric concentration of CO₂ is one of society’s most pressing goals.

The blue carbon solution: One of the most promising new ideas to reduce atmospheric CO₂ and limit global climate change is to do so by conserving mangroves, seagrasses and salt marsh grasses. Such coastal vegetation, dubbed “blue carbon”, sequesters carbon far more effectively (up to 100 times faster) and more permanently than terrestrial forests. Carbon is stored in peat below coastal vegetation habitats as they accrete vertically. Because the sediment beneath these habitats is typically anoxic, organic carbon is not broken down and released by microbes. Coastal vegetation also continues to sequester carbon for thousands of years in contrast to forest, where soils can become carbon-saturated relatively quickly. Therefore, carbon offsets based on the protection and restoration of coastal vegetation could be far more cost effective than current approaches focused on trees. Furthermore, there would be enormous ad-on benefits to fisheries, tourism and in limiting coastal erosion from the conservation of blue carbon.

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