Plastic pollution litters the world's oceans. It's damaging marine wildlife and ecosystems. A war on plastic is breaking out. In part 1 of this 2-part series, we meet Dutch young pioneer Boyan Slat's team working to clear plastic from the Great Pacific Garbage Patch. They have developed a system based on a 600-meter long floating tube. We also look at how microplastics affect living creatures and explore a shocking study that shows how plastic is contributing to rising levels of greenhouse gases.