Multiple choice What is the theme of World Environment Day, 2013? Think. Eat. Save Green Economy Less Waste. More Prosperity Environment for All Reveal answer Fill a bubble to check yourself A Correct answer Explanation The theme for this year's World Environment Day celebrations is Think.Eat.Save. Think.Eat.Save is an anti-food waste and food loss campaign that encourages you to reduce your foodprint. The theme for World Environment Day 2012 was 'Green Economy'.