Karaka leaves have helped scientists reveal a 250-year shift in CO2 levels in New Zealand's atmosphere. Photo: NZ Herald
Leaves collected on Captain Cook’s 1769 voyage show CO2 shift in New Zealand’s atmosphere
Density and porousness from 250-year-old leaves compared with the current samples of same species
Karaka leaves have helped scientists reveal a 250-year shift in CO2 levels in New Zealand's atmosphere. Photo: NZ Herald
