colors colours danger decay environment environmental environmental problems harm harmful lake lakeside pollution Slime slimy sludge water weeds waterways weeds Asia bottles civilisation contamination damage death Dirt dirty disaster disposal dump ecological ecology ecosystem Eichhornia fish garbage grunge hyacinth invasive nature patterns of decay plastic poison pollute polluted poor problem problems recycle river rubbish scrap sewage toxic trash unhygienic urban urban decay warning waste water beach bottle careless coast dangerous disasters globalization junk lifestyle messy natural ocean outdoors polluted environment recycling refuse sand sea seascape seaweed substance uncultivated wasteplasic waste abstract abundance abundant angles appearance background blades edges flora foliage grass grasses green greenery ground-cover growing growth light plants property seeds seedy self-seeding suburban-block texture textures unattended undeveloped-land vegetation wild bright challenge choice color concept connect connection design element game idea illustration inspiration jigsaw join link match metaphor object part piece puzzle shape skill think