A growing number of coffee drinkers want coffee that not only tastes good but is also ecologically produced. It's a market niche that"Coffee Circle,"a young company from Berlin, is successfully developing.After working as business consultants for several years, Martin Elwert and Moritz Waldstein-Wartenberg took some time off and traveled through parts of Africa. When they got back, they founded the company"Coffee Circle."They buy coffee in Ethiopia, process it in Hamburg and sell it via the Internet from Berlin. And for every kilo of coffee they sell, they send one euro to support an aid project in Ethiopia.