Thomas George Allan Green NZAM is a lichenologist, terrestrial ecologist and botanist.
His work particularly studies how lichens respond to extreme low temperatures and dryness, and especially how this affects photosynthesis.
Green was born in the United Kingdom and studied lichens for his PhD at University of Oxford that was awarded in 1970.
[1][2] Green moved to University of Waikato in 1974, and has continued to work there throughout his career.
He has long-standing collaborations in Spain and Germany, and he also works with scientists at research stations in Antarctica.