Feral deer are capable of increasing 35 to 50 percent each year in population. Peter Jacobs tells us “there is no short-term fix to mitigate deer impacts now that the population has been allowed to grow to over a million animals spread across the state.” But Victorians can still prevent the further spread of destructive invasive deer species to the rest of the Australian continent.

Alexander von Humboldt has been referred to as ‘the forgotten father of environmentalism.’ As early as 1844, he wrote that humans change the climate ‘by cutting down forests, by changing the distribution of water bodies, and through the production of large vapour and gas masses at the centres of industry.’ Humboldt also described the greenhouse effect in his opus magnum, ‘Kosmos’.

How big is the problem of invasive species? In the words of Deakin University’s Professor Euan Ritchie, ‘the short answer is: it’s massive’. Invasive genes and species are one of the biggest environmental problems facing Australia and the number one cause of native species extinctions. They also cause immense economic and cultural damage; since the 1960s, Australia has variously spent and incurred losses amounting to $390 billion due to invasive species.