Urban greening can reduce impact of global heating in cities, finds study

(The Guardian, 29 Sep 2022) Planting trees, rainwater gardens and de-paving can mitigate effects of climate crisis, according to analysis of 2,000 cities.

Urban greening initiatives such as planting street trees, rainwater gardens and de-paving can help mitigate the impacts of urban heating due to the climate crisis and urban expansion, according to a study that has found cities have been warming by 0.5C a decade on average.

Scientists at Nanjing and Yale Universities analysed satellite data from across 2,000 cities and compared surface temperature readings between cities and rural areas from 2002 to 2021.

The study found on average that cities are warming by a rate of 0.56C a decade during the day and 0.43C a decade at night. In comparison, rural areas are warming by 0.4C a decade during the day and 0.37C a decade at night, which means urban areas are on average warming 29% more quickly than rural areas.

The scientists found a link between a city’s size and the rate of urban warming, with megacities warming on average by 0.69C a decade during the day, compared with 0.41C a decade during the day in smaller cities.

External link

The Guardian, 29 Sep 2022: Urban greening can reduce impact of global heating in cities, finds study