He does recognise the "clear scientific fact of climate change" but in that ever-so-British way, thinks we should do it because we have to, rather than enjoy it.
I just can't persuade myself that climate change isn't happening. I'd like someone to convince me that it's not happening. But they haven't. Because it is.
So let's do our recycling, not use planes as much .... not because it's exciting or fun, but because we have to.