Question

Hello,
Recently I had an argument with my wife about an issue that troubles me מאוד. My brother-in-law organizes luxurious kosher cruises, and we took part in one of them in the past and enjoyed it greatly.
A short time afterward, I read about the scale of air pollution caused by some of these ships, and about the enormous environmental damage that comes from unnecessary pleasures. Since I am very concerned about environmental harm, this created a moral difficulty for me. (To me this brings to mind the words of the Sages: “The Holy One, blessed be He, said to them: Fools! I swore that I would not bring a flood upon the world, but by your lives, you yourselves will go into the flood.”)
When an opportunity came up to join another cruise, I refused for that reason. My wife argued that the ship would sail even without us, so my refraining changes nothing at all. I, by contrast, feel obligated to act according to my values, since “the world was created for me,” and therefore I do not measure my actions only by their visible consequences, but by the personal responsibility that rests on each person.
(I found a hint of this in the words of the Sages: they said that one who holds his organ is as though he brings a flood upon the world—not because the act of one individual actually caused the flood, for after all “all flesh had corrupted its way,” but because every person must view his actions as though they determine the fate of the entire world. And likewise we learned in the Mishnah: “…as though the whole world were half guilty and half innocent.”)
I would be happy to hear the Rabbi’s view, first and foremost, on the question of responsibility regarding air pollution in general: what level of concern is appropriate, and how one should relate, from a moral standpoint, to the human impact on the environment.
I would also like to understand: to what extent should a person insist that his actions be upright and clean, to the point that even if everyone acted that way, no harm at all would result to the world.