Being an island, Sri Lanka is rich in coastal and marine habitats. Sub-target_idal habitats such as coral and rocky reefs are abundant, along with large soft bottom habitats. In addition, inter-target_idal and coastal habitats are an important part of the marine ecosystem and provide shelter for a large number of plant and animal species.
Deteriorating air quality is a growing concern in most countries, including Nepal. Many factors are responsible for changing air quality and this varies from one location to another. This monograph has attempted to undertake review of the experiences with different policies related with influencing air quality changes in Nepal and also to identify potential policy instruments for further improving air quality.
In the late 1980s there were two campaigns to save African elephants. One banned international trade in ivory. The other established common property rights to elephants for local communities. Has either campaign saved the elephants? To answer this question, we constructed and solved two models, a biomass model and an age structured model. We conclude that in countries which successfully establish property rights, local communities will conserve elephants.