The results show that the comprehensive development degree (CDD) of the tourism-air environment system mainly maintains stable with fluctuation and the gap among different reaches in the Zone is declining; the coupling coordination degree’s (CCD) tendency in most regions remains similar as in the previous decade. The results illustrate that the method combing information entropy weight and the technique for order preference by similarity to an ideal solution (IEW-TOPSIS), coupling coordination degree model (CCDM), and gray GM (1, 1) prediction model is effective in evaluating the coupling coordination relationship between the subsystems of tourism and air environment and in proposing specific countermeasures for tourism development and air environment governance.

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The interaction between water governance and tourism is complicated and significant so that the study of the coupling coordination between these two subsystems is important. This study analyzes the correlation mechanism of the water governance-tourism system, constructs the composite and aggregated evaluation system which consists of 5 dimensions and 15 indicators, uses information entropy weight technique for order preference by similarity to an ideal solution method to evaluate the development degrees of both water governance and tourism growth of the 11 regions in the Yangtze River Economic Zone, analyzes the two subsystems’ relation of coupling coordination temporally and spatially with the coupling coordination degree model, predicts degrees of coupling coordination of the regions for the next 4 years with gray system prediction model, and proposes specific and generalizable countermeasures. The results show that these methods can provide an effective reference to evaluate the coupling coordination development of water governance and tourism and to provide scientific and generalizable countermeasures for enhancement.

The involvement of green marketing in sustainable consumption is becoming a hot topic in recent decades. However, the co-themed studies of these two terms are relatively less sufficient, and more detailed integrated research should be processed. This study uses CiteSpace to do bibliometric analysis regarding the knowledge structure and evolution of green marketing in sustainable consumption with visualization. Results show that green marketing in sustainable consumption is a prosperous topic with increasing annual publications. Besides, there are relatively complicated collaboration networks among institutions and strong extensive cross-regional collaborations, and the most productive authors may not be highly cited, which contradicts with former results of other studies. Furthermore, “green,” “consumption,” “sustainability,” and “consumer” are more welcomed in this research domain and are at the dominating status in the recent studies; some new research directions have emerged, and research focuses are more diversified, implying the multidisciplinary and comprehensiveness nature of this research domain. This study enjoys novelties by combining green marketing and sustainable consumption, constructing a knowledge framework of this domain, revealing current gaps, and proposing key research directions in the future, which cover the deficiencies of former studies and enrich the knowledge system, and are significant references for scholars to explore the research of this domain in the future more effectively and efficiently.

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