As human beings, we are vulnerable to confusing the unprecedented with the improbable. In our everyday experience, if something has never happened before, we are generally safe in assuming it is not going to happen in the future, but the exceptions can kill you and climate change is one of those exceptions.
We are all human beings, and we all have insecurities, but it's about being healthy and happy with yourself. I'm not perfect, and I will indulge in pizza and sweets on occasion. The goal is to make the majority of your decisions good for your body. So listen to your body, and treat it like your temple.
We've seen the worst that human beings are capable of. We've seen what happens when leaders abandon common decency in favor of rage and hate. Through the lens of history, the Holocaust happened yesterday, the civil rights movement was this morning, so we are not as out of the woods as we might have thought.