Malcolm Worby Designs is an award-winning design consultation firm that specialises in the design of natural, sustainable, and environmentally friendly buildings to governments, organisations, professionals, and individuals. Various natural and sustainable building methods, materials, and technology are recommended, designed, and specified for a project, depending on suitability. These include passive and active solar heating and cooling, solar water heating, photovoltaic, geothermal energy, wind generators, rainwater harvesting, grey water recycling, and waterless/composting toilets. Malcolm Worby gives talks, lectures, and presentations on Natural & Sustainable Building and Energy at Conferences, Universities, and other educational establishments, to Government Departments, Corporations, Municipalities, etc, and at educational conferences in various parts of the world.