The Scottish Parliament is considering a proposal for a law to make retailers charge 10p for a plastic carrier bag.
The proposal was forwarded by Liberal Democrat Mike Pringle who argues that money raised from the tax could fund environmental projects.
About one billion plastic bags are given away free in Scotland every year, but some stores now charge for them.
Mr Pringle, said plastic bags took a huge length of time to decompose in landfill sites and they made up 1% of the waste stream. His Plastic Bags (Scotland) Bill sets out a plan which would force all shops to charge 10p per bag.
The Scottish Executive has not yet taken a view of the bill because any decision would have to be based on "sound evidence" of an environmental benefit.
The Executive has commissioned its own study on the proposal for a bag levy. The findings, to be presented to parliament in the next few weeks, will be used to inform the decision-making process.
What do you think?
The Edinburgh Chamber is currently taking business opinions on the matter.