Partly as a result of international pressure during the 1990s, the government of the Union has begun to take greater care of the environment. Measures have been taken not only to preserve the rare fauna, but also to check the destruction of the environment, especially on Anjouan, which is densely populated. More precisely, in order to minimize the felling of trees for fuel, kerosene has been subsidized, and efforts are underway to replace the lost forest cover caused by the distillation of Ylang-ylang for perfume. The Fund for the Support of Community Development, sponsored by the International Development Association (IDA, a subsidiary of the World Bank) and the Comorian government, is applying itself to improving the water supply on the islands.