Final answer:
The installations 'Reverse City' and 'Plastic Tree' by artist Tayou provide artistic commentary on societal issues such as global unity, threats to humanity, consumerism, and pollution. 'Transversal City' is not directly referenced, but thematically connects to urban transformation as in the case of Curitiba.
Step-by-step explanation:
The project 'Transversal City' appears to be an artistic installation, though there is no direct reference to this specific name in the question. However, the installations described, such as Reverse City and Plastic Tree by the artist Tayou, offer a commentary on societal issues. Reverse City is a visually striking setup of massive colored pencils suspended from a stainless-steel frame which evokes feelings of awe and fear, pointing towards the visitors with the names of different countries inscribed upon them. This could signify the unity and diversity of a global village, as well as the potential threats that society faces. Plastic Tree is another installation by Tayou, featuring branches with colorful plastic bags attached, speaking to themes of consumerism, pollution, and waste in an urban setting.
The anecdote about the mayor of Curitiba relates to urban planning and the transformation of city spaces which ties into the themes of how art and urban environments can intersect. This historical note does not directly correlate with the art installations by Tayou, except for the broader topic of interaction within urban spaces.