Valentin is a director and producer of more than 50 television documentaries and reports on social, developmental, environmental and educational issues. His shooting and lecture tours have taken him to over 50 countries on all continents. For his films, he received a number of prizes and awards. “Taste the Waste” was a box office hit in 2011/12, and “10 Billion – What’s on your plate?” was the most successful German cinema documentary in 2015. He is chairman of the association “Taste of Heimat”, board member of the association “Foodsharing Germany” and co-Founder of the International Federation of Environmental Journalists (IFEJ).