Climate change threatens health and survival of urban trees

Climate change threatens the health and survival of urban trees, with more than half of species already feeling the heat, according to a new study.

City-dwelling oaks, maples, poplars, elms, pines and chestnuts are among more than 1,000 tree species flagged at risk due to climate change.

Scientists want better protection of existing trees and for drought-resistant varieties to be planted.

Trees have cooling effects and provide shade, making cities more liveable.

Many trees in urban areas are already stressed because of climate change, and as it gets warmer and drier, the number of species at potential risk will increase, said Manuel Esperon-Rodriguez of Western Sydney University in Penrith, Australia.

City and street trees can improve physical and mental health, are important in social integration and can mitigate the effects of temperature rises – something that hit home during the pandemic, he said.