There are many reasons to support the decarbonisation amendments, and many hon. Members—most recently the hon. Member for Brent North (Barry Gardiner), who is just leaving the Chamber—have set them out with great expertise and eloquence. From a security perspective, I want to underline that the stakes could hardly be higher. It is clear that those who will suffer the most harm and hardship from the impacts of climate change are often the poorest and most vulnerable, here in the UK and globally—those who have contributed the least to the problem. In that respect, this crisis is not unlike the banking crisis.
As many business leaders and experts such as Lord Stern have said, there is no business as usual at all in a 3° or 4° warmer world. A couple of years ago, at the launch of the UK’s climate adaptation plan, the big idea was managing the unavoidable and avoiding the unmanageable. “Avoiding the unmanageable” means keeping global temperature rises below 2°. For years, that line in the sand has been recognised by the UK and most other Governments, and enshrined in legal documents
under the auspices of the United Nations framework convention on climate change and the G8. That is the basis for the UK’s Climate Change Act 2008, and our carbon budgets, which the policies in the Bill will, or perhaps will not, deliver. Internationally, citizens and Governments of low-lying island states risk their entire nation being literally wiped off the face of the map, even with a 2° rise.