Professor Bert Moorhouse's report calls for Celtic and Rangers to work more closely together to tackle the problem.
When President Khatami came to power in 1997, he pledged to tackle the problem.
An expert group is due to issue an action plan next month to tackle the problem.
Jeff Yates, from the Litter-Free Guiseley Campaign, said more wardens were needed to tackle the problem.
BBC: Leeds City Council uses security staff as litter wardens
The scientists believe the only way to tackle the problem is to encourage people to quit.
MSPs on the cross-party committee called for a zero-tolerance government campaign to tackle the problem.
He said the majority of Scots - 91% - supported tougher action to tackle the problem.
Labour is promising to tackle the problem of "bogus self-employment" in the building industry.
BBC: TUC Congress: Balls pledge over scams in building industry
Mr Ferguson criticised the level of funding made available to tackle the problem in Northern Ireland.
Mrs Laing said it was a "tragic situation" and action was needed to tackle the problem.
The country's eight forces are promising "robust enforcement" action in a bid to tackle the problem.
BBC: Scots police forces launch festive domestic abuse focus
First, it attempts to tackle the problem of financial institutions that are too big to fail.
Even when governments are willing to tackle the problem, funds are often in short supply.
Taxpayers around the world are expected to fund literally billions of dollars to tackle the problem.
But while policies have attempted to tackle the problem, no major strides have been made.
The prime minister may now even have a chance to tackle the problem of Basque nationalism.
One authority which sought to tackle the problem was East Hampshire District Council.
Senior academics warned that the authorities were doing little to tackle the problem.
BBC: NEWS | UK | Education | Extremism advice 'could backfire'
The Home Office minister Beverley Hughes insisted that the government was doing all it could to tackle the problem.
Ms McIntosh said successive governments had lacked "the mettle" to tackle the problem.
It may be that blocking NF-Kappa B is a better way to tackle the problem than blocking the TLRs.
The Environment Protection Agency today announces a new policy to tackle the problem.
The report says no consistent or coherent framework exists to tackle the problem.
The NAHT says promising people could be forced out of the profession unless more is done to tackle the problem.
In early September health staff and the county council got together to hold talks on how to tackle the problem.
But environmentalists have complained of a lost opportunity, saying the world is running out of time to tackle the problem.
Bright Simons, a Ghanaian social entrepreneur, has devised a phone-based system called mPedigree to tackle the problem of counterfeit drugs.
She said the government has introduced a wide range of services, ranging from counselling to addiction treatment, to tackle the problem.
The report ought also to tackle the problem of who is responsible for ensuring that disinterested research is commissioned and funded.
For example on Hampstead Heath we worked with heath police, Safer Neighbourhood teams, parks officer etc to tackle the problem together.
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