Our wide brown land has always been subject to ''extreme weather events'' - droughts, floods, cyclones, bushfires and heatwaves. That's why no one can say the extreme events we've been suffering lately are a direct consequence of climate change.
But scientists have long predicted that one effect of global warming would be for extreme events to become more extreme, which is just what seems to be happening. So it would be a brave or foolhardy person who denied recent events had anything to do with climate change. And, certainly, the insurance industry, which keeps careful records of these events, is in no doubt that climate change is making things worse.
All this being so, you'd expect it to strengthen our determination to get on with doing our bit to reduce emissions of greenhouse gases. Yet cuts in spending on climate change programs are one of the main ways Prime Minister Julia Gillard proposes to cover the cost of rebuilding public infrastructure in Queensland. The cuts will save almost $1.7 billion over four years, compared with the $1.8 billion the temporary tax levy will raise.
So what on earth is Gillard on about?
She says the key to it is her determination to deliver a carbon price. ''There is complete consensus that the most efficient way to reduce carbon is to price carbon. Some of these policies are less efficient than a carbon price and will no longer be necessary - others will be better delayed until a carbon price's full effects are felt,'' she says.
She's right that there's strong agreement among economists and others that the most efficient - that is, the least costly in terms of economic activity discouraged - way to reduce our emissions of carbon dioxide is to build the cost of the damage done by the emissions into the prices of the emissions-intensive goods and services we produce.
This is the way to enlist market forces - our tendency to change our behaviour in response to changes in the prices we pay - in the service of the environment. It encourages us to find ways to reduce our emissions while giving us freedom to choose the ways that work best for us.
It also removes the price disadvantage suffered by the various forms of renewable energy because the prices of fossil fuels don't include the cost of the damage they're doing to the environment.
But, as the Australia Institute's Richard Denniss and Andrew Macintosh point out in a paper to be released today, imposing a price on carbon emissions won't solve the problems most of the affected climate programs were intended to tackle.
For instance, the cash-for-clunkers scheme and the Green Car Innovation Fund are designed to reduce emissions from cars. But the government's former emissions trading scheme specifically excluded petrol, and there's been no suggestion the new arrangements will include it.
The government plans to cut research into carbon capture and storage. But though raising the price of coal in Australia will provide some incentive for coal companies to continue pursuing clean-coal technology, they're unlikely to put in nearly as much money as the government was promising because the technology is not at all promising.
The government plans to cap or cancel various programs aimed at encouraging households to install solar panels. Again, it's doubtful whether raising the price of coal-based electricity will be sufficient to overcome the various impediments to better energy use in the home. So Gillard's claim that a price on carbon will remove the need for other measures to discourage emissions doesn't stand up.
But that's not to say she shouldn't be cutting back or getting rid of those particular measures. Most of them would be no loss. The cash-for-clunkers scheme is a hugely expensive way of encouraging a modest reduction in omissions. The green car fund is just a disguise for giving further help to car makers.
And the hope that the carbon dioxide emitted during the generation of electricity from coal could be captured and stored underground in a commercially viable way is probably a pipedream.
As for the schemes to encourage households to go solar, they've been far too generous, requiring the taxpayer to pay much too much for the reduction of emissions - up to $280 a tonne in the case of one scheme.
No, the disappearance of most of these programs will be no loss. But in claiming they will be made redundant by a carbon price, Gillard is trying to cover the government's embarrassment because most of them were introduced by Labor itself. And, as Denniss and Macintosh argue, she is inflating expectations about how much a carbon price could achieve. It may be the most important thing we need to do, but it's not the only thing.
Because market forces are powerful but far from perfect, the carbon price needs to be complemented by other measures. Getting rid of bad complementary measures is fine, but they need to be replaced by measures that are more cost effective.
And if Gillard is looking for cost savings to help pay for flood damage, she should start by getting rid of programs that actually subsidise the use of fossil fuels: the concessional taxation of company cars, the exemption from fuel excise for aircraft and natural gas and certain other tax concessions. Getting rid of those would not only help reduce emissions, it would save the budget more than $4 billion a year.
