Every time I go to the Byron Bay Writers’ Festival I’m asked the same question: since there’s no policy issue more important than responding to global warming, and we’re doing so little about it, why do I ever write about anything else?

I give the obvious answer. Though I readily agree that climate change is the most pressing economic problem we face, if I banged on about nothing but global warming three times a week, our readers would soon lose interest.

But even as I make my excuses, my Salvo-trained conscience tells me they’re not good enough. Even if I can’t write about it every week, I should raise it more often than I do.

I’m still combing through the budget’s fine print, but I’ve yet to remark that its thousands of pages make almost no mention of climate change.

Even the federal government’s latest, 2015 “intergenerational report” peering out to 2055, devotes only a few paragraphs to “environment” and avoids using words starting with c.

I fear that history won’t be kind to the present generation – and particularly not to people with a pulpit like mine.

Illustration: Dionne Gain

We’ve known of the scientific evidence for human-caused global warming since the late-1980s. Since then the evidence has only strengthened. And by now we have the evidence of our own senses of hotter summers and autumns and warmer winters, plus more frequent extreme weather events.

And yet as a nation we procrastinate. Our scientists get ever more alarmed by the limited time we have left to get on top of the problem, and yet psychologists tell us that the harder the scientists strive to stir us to action, the more we turn off.

Our grandchildren will find it hard to believe we could have been so short-sighted as to delay moving from having to dig our energy out of the ground to merely harnessing the infinite supply of solar and wind power being sent to our planet free of charge.

What were we thinking? Did an earlier generation delay moving from the horse and buggy to the motor car because of the disruption it would cause to the horse industry?

The biggest mistake we’ve made is to allow our politicians to turn concern about global warming into a party-political issue, and do so merely for their own short-term advantage.

The initial motives may have been short term, but the adverse effects have been lasting. These days, for a Liberal voter to worry about climate change is to be disloyal to their party and give comfort to the enemy.

Apparently, only socialists think their grandkids will have anything to worry about. The right-thinkers among us know the only bad thing our offspring will inherit is Labor’s debt.

Global warming used not to be, shouldn’t be and doesn’t have to stay a right-versus-left issue. In Europe it’s bipartisan. Margaret Thatcher was a vocal fighter for action on climate change, and the Conservative Party is anti-denial to this day.

If you remember, John Howard went to the 2007 election promising an emissions trading scheme. The big debate in that campaign was whether Labor’s rival plan was better because it started a year earlier.

John Howard went to an election promising an emissions trading scheme. AAP

The econocrat who designed Howard’s scheme, Dr Martin Parkinson, was the same person the Rudd government appointed to develop its scheme. The Department of Climate Change was a virtual outpost of Treasury. Indeed, I know of few economists who aren’t supporters of putting “a price on carbon”.

At the time, the Libs’ strongest supporter of action on climate change was a Malcolm someone. I wonder whatever happened to him?

As Liberal opposition leader, Turnbull was offering bipartisan support for Rudd’s emissions trading scheme when he was thrown out by Tony Abbott, who quickly changed his views to become leader of the party’s then-minority of climate change deniers.

I don’t doubt there are many, many Liberal voters who accept that global warming is real and would like to see the Coalition acting more decisively, but feel obliged to keep a low profile and let Dr John Hewson do the talking for them.

The National Party's climate change denial is puzzling. Simon O'Dwyer

The fossil-fuel industry is no doubt generous in its support to any party willing to help it stave off the evil hour, but the attitude of business generally is different.

Initially, it accepted that the move to renewable energy was inevitable. In which case, the government should just get on with it, reducing uncertainty by making the rules for the transition as clear and firm as possible.

But when the Libs succumbed to the deniers, business savoured the temporary relief of doing nothing. Now, however, the electricity and gas industries are in such a mess that business is back to demanding certainty in the inevitable move to renewables.

The Coalition, unfortunately, is utterly incapable of agreeing to anything meeting that description.

With states taking the lead in the renewable energy push, a report by the Climate Council puts each state's efforts against one another.

Which brings us to the mystery of the seemingly denier-packed National Party. How any farmers or people from country towns can doubt the reality of climate change is beyond me. The National Farmers’ Federation certainly doesn’t.

But we can’t put all the blame on short-sighted politicians and crony capitalism. If enough of us did more to voice our disapproval, the pollies would change their tune PDQ.

And we’d have a more convincing story to tell our grandkids when they want to know what we did in the climate war.

Ross Gittins is the Herald’s economics editor.