Naturally occurring methane has two sources, defined as biogenic methane and thermogenic methane. Biogenic methane is the product of microbial activity, the formation of thermogenic methane is controlled by temperature, pressure and also by the composition of organic matter preserved in the sediments. Gas hydrates form the largest methane sink in the methane cycle. Methane hydrate is a mix of water molecules forming an ice structure and ...

Over the centuries, European governments have been successful in reducing the death toll related to natural phenomena. This has been achieved by addressing all three dimensions of the risk triangle—hazards, exposure, and vulnerability. However, cultural and political differences result in subtle, but distinct differences in the context of natural hazard governance. While these differences can be considered a strength in dealing with local ...