Many of us are doing our bit to reduce plastic pollution by recycling and reducing single-use items such as bags and straws, but is it enough? With hundreds of thousands of tonnes of plastic leaking into our seas annually and plastics having been found in all corners of the ocean, there is no doubting the impact they're having on waterways and marine ecosystems. These powerful and hard-hitting images show the horrifying extent of damage. Also read on to discover which countries are responsible for the Great Pacific Garbage Patch.