Lloyd Alter is a writer, public speaker, and former architect, developer, and inventor. He has published over 14,000 articles on Treehugger . He has become convinced that we just use too much of everything — too much space, too much land, too much food, too much fuel, too much money — and that the key to sustainability is to simply use less, what he calls Radical Sufficiency. He teaches sustainable design at Ryerson School of Interior Design and when not writing can often be found in his running shoes, on his bike, or in his 1989 Hudson single scull in Toronto, Canada.