In Africa, East Asia, Pacific and Latin America & Caribbean regions have badly sanitary in solid waste management which is open dumping. So these 3 regions want to change to sanitary landfills but sanitary landfills still effect to environment such as release leachate and gas that occurred in landfills ex. methane (ventilation in landfills do not good). Some landfills have been treat leachate by using electrically power aerators but its use of high cost and cannot reduce gas which can cause green house gas. Three regions want to use gas from landfills to use in way of energy for make more beneficially. There are 3 ways to manage leachate; 1. Separate water and waste 2. Containment a leachate to treated first before release to environment 3. Control of leachate to the release to environment but there is a bad point too such as if that area are too moist so that area will absorb the leachate, so the water around there will contaminate of leachate.