Sustainability related to tourism focuses on: preservation of nature and cultures, poverty alleviation and reduced climate change. These issues are mostly economic and environmental ‘despite the early definitional focus of sustainable tourism on subjective well-being (SWB) and intergenerational equity’
Long haul travel requires air transport, which does not only contribute to climate change through emissions of carbon dioxide but also by emissions of nitrogen oxides, carbon-hydrates, water vapor and the forming of contrails. Half of the contribution to current aviation related climate change is caused by these non-carbon dioxide impacts
Fourth hypothesis: general happiness is positively correlated to the reported personal ‘importance of traveling’
The correlation between the statement “travel is important to me” and corrected general happiness is 0.078 but is not significant
However: there is a correlation of 0.095 between corrected general happiness and importance of travel when controlling for limitation in destination choice (significant at the 0.01 level).
Would a future with less long haul travel lead to general unhappiness? (I)
Travel to remote locations seems not necessary to achieve greater general happiness, thus reducing the environmental impact by reducing the total distance traveled may be reached without loss of general happiness.
Would a future with less long haul travel lead to general unhappiness? (II)
If aviation is actually reduced, then some impact on general happiness might occur. But this might be in two directions: people actually hindered by the limits become a bit less happy, while people that now already are limited in travel choice might change their goals with respect to travel and thus become more happy.
Finally the causality is of importance; if happy people travel on average more than unhappy people, limits to air transport will not affect general happiness.