No concern is as simple as it seems. And just as important our information is always changing. The world itself is constantly shifting, and our data follows suit. In the end, the most important tools are knowledge, empathy, understanding, and being able to see the big picture. The world encompasses all animals, plants, people, and physical objects around us.
Environmental concerns do likewise.
We must expand our mindset to include this wider view. On your personal quest to Save The World, the first step is information. Ask questions like those above and understand environmental topics that concern you. This way, you understand what effects your actions are creating and can make the most efficient positive impact on the world.