We mulch, we compost, we recycle, we're as energy efficient as possible.
In the end, it's not going to make a dime's worth of difference. Climate change, the Anthropocene Mass Extinction Event, and the inevitable Malthusian Check to humanity is inevitable; in the unlikely event that we finally reach a global consensus to engage in any meaningful corrective action, it'll be too little, too late.
All things are conditional; they arise and are sustained by the causes and conditions which preceded and exist concomitantly with them; when those contributory and sustaining causes and conditions fade away, the phenomena dependent upon them fades away, too. Additionally, all things are impermanent; everything; including our planet, our solar system, and the universe will one day disappear. As cosmically insignificant a species as Homo sapiens is no different. We have based our global society upon the exponential growth in consumption of natural resources, fueled by the burning of fossil fuels, and by so doing we have irreversibly destabilized the climate of our planet, which up until the Industrial Revolution had remained so stable and temperate that it allowed the human population to burgeon exponentially from 4-6 million at the beginning of the Mesolithic to 7.7 billion people today.
This is simply the natural and logical consequences of our actions; our collective karma.
Knowing this, I continue to compost, recycle, and save energy anyway, because doing the right thing is in no way ever dependent upon probability of success. Besides, perhaps it's not too late. I might be wholly mistaken. I often am.
“It's the action, not the fruit of the action, that's important. You have to do the right thing. It may not be in your power, may not be in your time, that there'll be any fruit. But that doesn't mean you stop doing the right thing. You may never know what results come from your action. But if you do nothing, there will be no result.”
Mahatma Gandhi