here are some topics about tourism and it's importants

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Global tourism accounts for c. 8% of global greenhouse-gas emissions.[9] Emissions as well as other significant environmental and social impacts are not always beneficial to local communities and their economies. For this reason, many tourist development organizations have begun to focus on sustainable tourism to mitigate the negative effects caused by the growing impact of tourism. The United Nations World Tourism Organization emphasized these practices by promoting tourism as part of the Sustainable Development Goals, through programs such as the International Year for Sustainable Tourism for Development in 2017.[10] Tourism has reached new dimensions with the emerging industry of space tourism, as well as the cruise ship

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Between the second half of 2008 and the end of 2009 tourism numbers declined as a result of a strong economic slowdown (see Great Recession), and in consequence of the outbreak of the 2009 H1N1 influenza virus.[3][4] These numbers, however, recovered until the COVID-19 pandemic put an abrupt end to the growth.[citation needed] The United Nations World Tourism Organization has estimated that global international tourist arrivals might have decreased by 58% to 78% in 2020, leading to a potential loss of US$0.9–1.2 trillion in international tourism receipts.[5]

tourism is very important