Seeing Australia’s beloved gumtrees dying makes my insides knot. If they can’t survive, how can we? | Jess Harwood

Dr Dean Nicolle has planted 10,000 eucalypt trees and mallees on a block of land south of Adelaide since 1993 .

South Australia is in the grip of its worst drought in 40 years .

The International Union for the Conservation of Nature ( IUCN ) has warned that 25% of eucalyspts are at risk of extinction, with more added to their Red List of threatened species in 2019 .