Thanks everybody.
glasgowdan – I work for what is essentially a well behaved NGO, we represent local authorities so tend to be on the sensible side of debates. The project in question asks the trawler fleet in Scotland to land any litter they catch in their nets while fishing instead of throwing it back in. Hopefully the press release will highlight what a good job all involved are doing.
maccruiskeen – I know exact weights but would only be guessing volumes and I don’t feel too comfortable with any calculations done. They would probably be quoted widely in the marine litter world so I’d rather they were fact. It’s scientifically unfounded comparisons that often undermine the environmental sector.
About 50% of the litter landed (by number of items) is plastic. The rest is metal, wood, rubber etc. Because this rubbish has been removed from the seabed it tends to be pretty dense or an item that is easly filled with water.