...I have met very few people who are willing to commit suicide to save the environment.
It is always about someone else, often Indians and Chinese. On occasion the reflection on "someone else" can border on, or even lapse into, racism.
I'm certainly attached to my life, although, again, I agree with you on the biological point of species dying off because of the accumulation of their waste products.
This, of course, with respect to yeast accounts for the existence of wine and beer. They die off from their waste before eating up everything. Certain bacteria do this as well, including those that cause fatal diseases, since they kill their "planet" - the "planet" being the victim of the disease the bacteria cause.
The problem is - and I include myself here - is most people consider themselves more important than yeast cells. Whether we are or not is a point involving philosophy or possibly spiritual views. Neither philosophy nor spiritual views, however, is likely to affect biology, which is biology nonetheless and thus subject to the laws of biochemistry, chemistry and physics.
I do think it is ethical to have fewer children - I have two which is actually below the replacement value, but in many opinions hardly low enough. (I am often lectured on my hypocrisy be people who have zero children, although my experience suggests that even among these people, very few commit suicide to show the depth of their environmental commitment to lowering the population to match the Earth's carrying capacity for human beings.)
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