I used to think some cataclysmic, climate-related event would shock the world into taking the steps needed to preserve the future of the human species. But after seeing what's happened this past decade, I'm no longer sure any event or set of circumstances will be enough to jolt governments into action. (The 2008 bank-induced economic meltdown spurred politicians to spend hundreds of billions just to get the defective economy back up and running again!) "This event is unlike anything recorded in North American history." Credit:Nicolas Walker Just look at Canada. In British Columbia, where I live, a warming climate has allowed insects the size of grains of rice to destroy $65 billion worth of pine trees in just a bit over a decade. For millennia the mountain pine beetle, a native of Canada, has been kept in check by our winter temperatures which reach minus 35 degrees for several days. Not anymore. The British Columbia Ministry of Forests says that, thanks to global warming, we have not had one of these widespread weather events in the British Columbia interior since the winter of 1995-96.

With no more killing freezes, pine beetle numbers have exploded, destroying 710 million cubic metres of commercially valuable pine timber. That's more than half of all such pine in the province. As the climate warms, the beetles have been blown over the Rocky Mountains where pine trees of the boreal forest extend across Canada. "Your new prime minister Tony Abbott is just another who finds it easier and more politically rewarding to focus on the next election cycle." Credit:AFP This unprecedented event is unlike anything recorded in North American history, but it's not been enough to galvanise our government to get serious about acting on climate change. I'm at a loss to understand why. But if the melting polar ice cap, and the devastation wrought by hurricanes Katrina and Sandy was not enough to force governments into serious action, I guess I can hardly expect a little mountain pine beetle to do it. From what I can see, it's a similar story in Australia. Half the coral on the Great Barrier Reef has disappeared in the past 27 years and its size could halve again in the next decade with degradation of the environment and the increasing frequency of cyclones.

Bushfires in Australia are getting more severe and more frequent. I see in Sydney you have already had your first fires barely a week into spring. And what has your new government done in response? As soon as Mr Abbott won power, he promised to wind back Australia's recent efforts to combat global warming. His promise to scrap the carbon tax, a tax which had been a timid step in the right direction, to close down your green energy bank and to reduce the rebates for buying solar panels, all send a terrible signal to your entrepreneurs and to the community. And all of it is being done in the name of saving the economy. But for more than 20 years the insurance industry has been telling us we have all been paying more for changes in the climate. Why aren't we listening to the insurers, the hardest business heads of all? I would have thought Australia would be leading the world in developing a new economy because climate change is going to devastate Australia.

Instead, mining magnates are manipulating the debate in Australia just like they are doing elsewhere. Like the tobacco industry before them, they have known for years that climate change is happening and that burning fossil fuels is at the heart of it. But to maximise their profits they have continued to sow misunderstanding and confusion, funding the sceptics to perpetrate the myth that global warming is junk science. They should be ignored because there is no confusion in the scientific community about what's happening to our planet and what the future holds unless we change the way we live. A carbon tax is just one small step to encourage companies and individuals to reduce dumping rubbish into the atmosphere. Don't Australians pay to put their junk into landfill? The consequences of dumping our junk in the atmosphere are far greater than leaving garbage in the streets so why don't we limit it by making people pay to dump it?

Loading It's the most basic lesson of economics. Anyone who understands and cares about the environment and economics will know ditching the carbon tax is not only crazy, it is absolutely suicidal. David Suzuki is an award winning scientist, environmentalist and broadcaster. He will speak at a City of Sydney City Talk on Tuesday, September 24, at City Recital Hall, Angel Place.