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1“... such as Switzerland, the Netherlands, Canada and the USA since the late 1980s, there was very little activity...”
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2“... process has been approached in the United States, Ireland, Germany, Netherlands, Switzerland and Norway...”
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3“... States, Ireland, Germany, Netherlands, Switzerland and Norway, and at how successful they have been thus...”
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4“... in Switzerland, although prior to that there were several smaller scale projects. Schemes then spread to Germany...”
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