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The two sides of the engraved blade bear the inscriptions L'Italia and L'Unione . Even shifting to clean-burning fossil fuels could be considered a GHG-reduction measure in places where wood is not harvested renewably , because it reduces emissions of methane and black carbon , as well as of CO2 ( Smith and others 2000 ) . Popular poetry of the mid-1800 's often took its themes from travel and historical subjects , as in this collection of poems inspired by the author 's Grand Tour of Europe . Though Pickering was a British publisher , both this volume and the Burns shown next bear the label of an American bookseller , Lockwood 's , of 411 Broadway , New York . In the Great Transition scenario , with an international environment that is focusing on equity through more vigorous connections with other southern regions and in a supportive domestic environment , output per person expands rapidly , reaching an average level for the region as a whole that is close to the average of the industrialized countries in 1995 . Another is that some products of incomplete combustion – particularly methane and black carbon particles – are even more powerful greenhouse pollutants than carbon dioxide , and therefore have higher global warming potential . However , even in areas with sufficient solar radiation such as South Africa , solar cookers can only replace approximately 40 per cent of a household ’ s energy needs ( GTZ and DME 2004 ) .