Recycling bins placed in public places are a good idea, but are they effective enough? Some experts feel that this is not so and more could be done to make the use of recycling bins easier and therefore better for the community.
It has been found that instead of having a lid; recycling bins with holes are much more effective and prevent the placing of other waste being mixed in with metal, glass and paper. Just by making a round hole for cans and a slot for paper etc increases the amount of recycling by up to thirty four per cent that according to Sean Duffy, an associate professor of psychology at Rutgers University.
Source [Tree Hugger]