Very interesting reply @hardcorefornerds.
During one phase, my younger self could have been described as a social-democratic green, because I then saw the destruction of the ecological basis for human life as the number one issue. It still is.
I guess the difference between then and now, (I would describe myself now as a green anti-capitalist), is that I’ve come to realise there is no hope of addressing any of the ecological issues we face and what might come under the rubric ‘sustainable economy’, without severely curtailing the power of the market and bringing all relevant fields – energy, food production, housing, transport etc. under common (not necessarily state) ownership and democratic control.
By the time we’ve achieved the latter the hill we will have to climb to reach sustainability will be much steeper – but optimism of the will, and all that.