为了保护森林资源和生态环境，减少薪柴等常规能源的消耗和浪费，湖北省保康县从１９９９年４月份起，全面启动“四三一”能源工程。工程的具体内容：四（四靠）———热水靠太阳能、开水靠烧煤，炒菜靠用气，煮饭靠用电；三（三改）———改造生活用灶，改造农村支柱产业... In order to protect the forest resources and the ecological environment and reduce the consumption and waste of conventional energy sources such as firewood, the “411” energy project was started in an all-round way in Baokang County, Hubei Province since April 1999. The specific content of the project: four (four by) --- hot water by solar energy, boiled water by burning coal, cooking by gas, cooking by electricity; three (three changes) --- transformation of living stove, rural reconstruction pillar industry...