The Greens have proposed a carbon tax as an interim measure to begin cutting carbon emissions. Although there are strong reasons to favor an emissions trading scheme over a carbon tax in the long run, I think it’s time to look seriously at this option. Here a few points in no particular order.

* since the price of carbon is initially capped under the CPRS, it’s just like a carbon tax in the short run
* the way to dispel public fear of a new tax is to bring it in. Look at capital gains tax and GST, both the subjects of highly successful election scare campaigns (in 1980 and 1993 resp) and both now uncontroversial.
* the capture of the political right by delusionism is now irreversible, as can be seen from the embrace of the obviously loony Lord Monckton. There’s no chance, now or in the foreseeable future of a deal with these guys. In particular, the version of the CPRS negotiated with Turnbull and briefly supported by the majority of Coalition members is unsalvageable in every respect. There’s no way the deal can be modified enough to get Liberal support now, and on the other hand it’s too much of a dog’s breakfast to take to a double dissolution.
* The Greens will almost certainly regain the balance of power in the Senate after the next election. Much as the government dislikes it, they are going to have to rely primarily on deals with the Greens to get legislation through in future. They might as well start dealing now.

In general terms, the government lost control of the debate with the defeat of the Turnbull compromise ETS last year, and has done nothing to regain it. Turning up with the same discredited compromise in February makes no sense at all. This is a time for firm action, not more delay.