urban creep noun [U]
UK /ˌɜː.bən.ˈkriːp/ US /ˌɝː.bən.ˈkriːp/
the gradual loss of green space in a city that happens when gardens are paved over, house extensions are built etc.

Urban creep can cause problems because it reduces the amount of open land which can absorb rain water, putting extra pressure on drains … Researchers studying aerial images found that 11 hectares of green land in the capital is being lost annually, more than six hectares of it through urban creep. About one hectare is being gained each year through the regeneration of former industrial areas.
[www.bbc.co.uk, 14 October 2019]

pocket park noun [C]
UK /ˈpɒk.ɪt.pɑːk/ US /ˈpɑː.kɪt.pɑːrk/
a small area of parkland built on an empty piece of land

Unloved urban spaces will be converted into small “pocket parks” with a new round of Government funding … Community groups can now bid for new parks or reimagined spaces to be converted into play areas and vegetable patches. The Government will spend £1.3 million as an extension of its pocket parks plus scheme, which began in December 2018.
[Sunday Telegraph, 27 October 2019]

smart city noun [C]
UK /ˈsmɑːt.sɪt.i/ US /ˈsmɑːrt.sɪt̬.i/
a city where information and communications technology is used to make life better for its residents

Sidewalk Labs’s plans to create a smart city in a disused area of Toronto can proceed but on a much smaller scale than it had wanted. Any data the Google-affiliate collects there must be treated as a public asset … Sidewalk Labs won an initial contract to develop the area in 2017 and promised a radical mix of offices, retail spaces and homes, with high-tech solutions to urban problems such as traffic and waste disposal.
[www.bbc.co.uk, 31 October 2019]

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