John Key has responded to more than 35,000 climate action marchers by smugly claiming that because 80 per cent of our electricity comes from renewable sources, we're respectable. Such a boast is irrelevant to the task at hand - reducing carbon emissions to zero (and beyond). We're still one of the highest carbon emitters per capita and have to stop it.
We know that there's a fixed amount of carbon the atmosphere can take before we enter the realm of dangerous climate change. The 2009 Copenhagen agreement settled on 2C of warming as the limit above which danger and instability will be upon us. We know the global average temperature is already up around 1C - halfway there - and most of that has occurred over the last 30 years. And we know that under current targets offered, emissions from the United States, China and Europe alone will use up virtually all the headroom that is left.
So without radical changes we will exceed 2C. The challenge now is not just to reduce carbon emissions to zero, but to actually remove carbon from the atmosphere. Even with that mountain to climb, we have to instigate enough adaptation policies to weather the storm that will prevail until the atmospheric carbon concentration gets back down to a "less than dangerous" level.
This is why the majority of public submissions to our Government on our contribution to emissions reduction by 2030, was for emissions of 40 per cent below 1990 levels. Tim Groser has gone to Paris offering an 11 per cent reduction. It's pathetic.
The Government has presented a ropey analysis of the high costs of doing any more to reduce emissions. The work is so bad and so misleading that it should damage any reputation of honesty. From what I have seen of the document I don't blame the modellers for this analysis, I blame the Government for asking them to include stupid assumptions. Examples include no scope for new technology uptake, the exclusion of any initiatives with forestry and an unrealistic baseline case that ignores initiatives under way.