This study explored dominant topics about the metaverse discussed in Twitter and the sentiments in each topic in the case of Decentraland using topic modeling and sentiment analysis. The appraisal theory of emotion and motivation theory were used to explain why positive or negative sentiments were expressed toward specific topics. The majority of topics were related to economic benefits such as coins, NFTs, tokens, estate, land, and spaces or socializing with others at specific events. Many of them included predominantly positive sentiments because consumers appraised them as motive consistent. This serves as an important implication for marketers and developers in the metaverse that they need to focus more on these features so that consumers can interact with the motive-consistent features and thus have positive emotions.

The word “permaculture” is a contraction of “permanent agriculture” or “permanent culture”. Permaculture principles are designed to support (or ensure) the survival of humanity, the earth and all on it, and, to improve our standard of living. Permaculture can be defined as：a design system for creating sustainable human environments that can be (relatively) easily constructed and maintained. The principles of permaculture designs are：relative location every element (such as house, rice paddy, road, etc) is placed in relation to each other such that each assists the other；each element performs multiple functions；each function is supported by many elements；energy efficient planning；using biological resources rather than fossil fuels；energy cycling on site (both fuel and human energy)；Using and accelerating natural plant succession to establish favourable sites and soils；poly󰠏culture and diversity of beneficial species for a productive, interactive system；use of edge and natural patterns for best effect. These principles can be used for any permaculture design, in any climate, and at any scale. There has been very little scientific examination of Permaculture, and as such, it must be viewed as a design philosophy.