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The IMF wants a levy on ship and plane fuel, but that won't magically create low-carbon alternatives.
Even oil and gas companies have now started calling for a global carbon tax.
Even oil companies have started asking for a price on carbon, not least because it could help them avoid other, stricter forms of regulation.
James Hansen says currently proposed carbon pricing schemes won’t solve the problem.
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Former NASA climate scientist James Hansen has come to the Paris climate talks to push his radical alternative to current carbon pricing schemes.
We must tackle the climate challenge by using economic tools to develop a consistent and equitable system for pricing carbon.
What would an environmental economist do?
Environmental economists have long argued a carbon price is the best way to factor in the social cost of climate change. Did Obama effectively use a carbon price to nix the Keystone XL pipeline?
A few changes in South Africa’s tax administration will have a huge impact on business.
South Africa has sent a strong signal against tax evasion and is planning to introduce a carbon tax. There are also incentives for employers keen on taking inexperienced job seekers.
The tainted VW Group may drag the rest of the car manufacturing industry into the mud.
The VW emissions scandal gives governments every right to increase their supervisory role beyond regulation and to involve themselves to a much larger degree in economic activity.
Climate diplomacy: in a another joint announcement from the US and China, president Xi Jinping committed to an emissions trading scheme in 2017.
Chinese President Xi Jinping has made a landmark commitment on climate change, pledging to launch what will become the world's largest and most important emissions trading scheme when it begins in 2017.
Abbott isn’t the first leader to be toppled amid questions over his approach to climate change.
AAP Mick Tsikas
From Hawke-Keating to Rudd-Gillard, climate policy has an uncanny ability to cost Australian political leaders their jobs. And it was a key element in the rivalry between Tony Abbott and Malcolm Turnbull.
Noami Klein speaking in Sydney.
Christopher Wright speaks with Canadian journalist, author and activist Naomi Klein about capitalism's impact on the environment and how it has influenced our responses to climate change.
Deja vu? Anti-carbon tax sentiment has been around for decades.
AAP Image/Paul Miller
Carbon tax debates have been happening ever since the late 1980s, when policy-makers first started taking the "greenhouse effect" seriously.
Environment Minister Greg Hunt, Prime Minister Tony Abbott and Foreign Minister Julie Bishop at the announcement of Australia’s 2030 climate target.
AAP Image/Mick Tsikas
Australia will reduce greenhouse gas emissions by 26-28% below 2005 levels by 2030. Experts respond.
Climate costs can seem scary, but it’s all in how you look at them.
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Is ambitious action on climate change a recipe for a significant hit to the economy and our living standards?
Major emitters of fossil fuels in South Africa are opposed to a carbon tax.
The general response to carbon tax is not a positive one, but it may be something South Africa will need to accept.
It might be nice if buying the right to emit greenhouse pollution could be made a bit simpler.
The term 'carbon tax' is a political poison in Australia, thanks to the previous carbon tax which was actually an emissions trading scheme. Yet ironically, many economists prefer a tax over an ETS anyway.
That $550 from the carbon tax repeal might be in your bank account, or it might have been gobbled up by exchange rates.
The carbon tax repeal was supposed to save the average household A$550. And it might well have done, but teasing out the exact figure amid the myriad other economic factors is a herculean task.
Tasmanian hydro power had a boom couple of years when the carbon price was in place.
A year after the demise of the carbon tax, we might expect both coal and greenhouse emissions to have bounced back, at the expense of renewables like hydroelectricity. Sure enough, that's what happened.
Opposition leader Bill Shorten and Shadow Environment Minister Mark Butler say the ALP supports renewables but haven’t yet decided whether and how to price carbon.
AAP Image/Alan Porritt
Labor says it hasn't yet decided what climate policy to take to the next election, although this week's leak has bolstered the idea that it will involve carbon pricing – a subject with a long and vexed history for the party.
Labor leader Bill Shorten has three formidable challenges once the immediate problem of the leak has passed.
The leak to the Daily Telegraph of an options paper on Labor's carbon pricing policy has been a kick in the guts for Bill Shorten.
In a Fairfax newspapers opinion piece, Mr Hunt said the carbon tax cost just over $1300 a tonne for the emissions reduced.
AAP Image/Mick Tsikas
The carbon tax was not a cost or "slug" on the economy -- it raised revenue that could be used elsewhere in the economy for public infrastructure or to allow cuts to more economically harmful taxes.