Typical nontoxic wastes in a fishery harbour include paper, plastic bags, plastic containers, metal containers, old tyres, pieces of rope, bits of netting, food wrappers, bottles, fruit peels and flotsam like driftwood, generally termed as litter. This type of waste not only makes the harbour look dirty, it can clog drains, foul boat propellers, choke water intakes and so on. Some of the ...