38. Management of shared natural resources. Important transboundary environmental concerns include water flow and quality, sediment transport, wildlife trade and biodiversity conservation, timber extraction, fisheries, and air pollution. In most situations, those issues are dealt with through bilateral relations. There are a number of regional forums that include consideration of transboundary natural resource and environmental issues, such as the Association of Southeast Asian Nations, the ADB–GMS consultative planning forum, and the Mekong River Commission (MRC). Yet, they have not had a convincing or systematic influence, as countries have been reluctant to compromise national sovereignty over development rights and controls. This lack of genuine collaboration on transboundary environmental issues may be changing. In recent years, there have been cases where upstream development has caused such social and political concern in downstream countries that the MRC in particular has gradually begun to show potential as a regional facilitator and moderator in environmental and resource use matters.