It's so rare that we see the full consequences of our actions, particularly when they have impact thousands of miles away. So I always appreciate it when someone takes the trouble to follow the causal chain, even if that means going to the middle of the Pacific Ocean.
A while back, I linked to photographer Chris Jordan, who is doing some remarkable work documenting the impact of plastic on albatrosses. Now Jordan is hard at work finishing a documentary, called "Midway–Message From The Gyre," and has put out a truly beautiful and moving trailer.
You can find out a lot more about Jordan and this project, and read an interview with him, here.