We are obligated to act as our opinions and beliefs dictate. We can believe in reducing out carbon footprint, spend much extra money on solar and wind energy, and not actually reduce our carbon footprint, only think we do. We can create an industry like the Alberta oil sands, buy undervalued natural gas to produce overvalued synthetic crude, and hush anyone who has actually worked out the energy balance equation on those plants. Oh well, they create work.
We see vegetarians destroying there health for a "kill no animals" philosophy. It is our beliefs, values and opinions that drive us, even when our beliefs, values and opinions are sometime just wrong. Some of the time our actions are just wrong... consider ISIL, and then some of the time our actions just do not matter... consider most religions.
Our big world problem is still local / regional overpopulation and religious wars.
But what do I know?