In reply to Jimbo W:
I think it's worth acknowledging, as you do, that pretty much just living (and especially having children) is bad for the environment and ecosystem. This isn't unique to humans - any species which becomes a runaway success does it - but we're pretty clearly the worst. To avoid it, we'd have to go into population decline and massively cut our use of resources - or invent and implement new ways of reversing damage (not just reducing it).
The notion of 'saving the planet' gets it back to front, we start from a position of each causing significant damage to the world around us. Recycling, or eating less meat, or using green energy isn't helping the environment, it's choosing to do less harm to it.
We can all make a small difference to the environment around us, but stopping or reversing environmental degradation really can't be done by individual choices, at least not by individuals living modern (that is, say, post-Roman) lifestyles.
To really address this, it can only be done at the level of international treaties and cooperation. And I can't see the necessary huge changes happening that way until things get really, and obviously, bad.
If you just want to do a bit less damage, and are happy carrying on causing a bit less degradation than those around you, then yes, there are a lot of individual choices you can make. This is still worth doing - making an effort to cause less damage is basically all we can expect from normal, considerate people - but let's see it for what it is.
Post edited at 14:36