What's the point of preserving the environment if not for the creatures who rely on it? The 6.5 billion people who have destroyed most of the planet already are not the only ones who count or should count.

The correct answer is cotton because raising it doesn't require confining and killing social, sentient, intelligent, emotional animals.

Surprise me; argue rationally with some understanding of ethics. You can't reasonably argue that sheep are not social, sentient, intelligent, or emotional. You'll have to argue that there is some as yet undiscovered and profound difference between people and sheep that allows us to do to sheep what we would not do to people.

If you want to reduce global warming, the best thing that you could do is not have kids. Another great thing is to adopt a vegan lifestyle. How many of you claiming that you want to stop global warming have kids, eat meat, and wear leather?