Climate change has been a big issue since when I was younger. However, the peak of the people's reaction to the issue has appeared this year since a couple of months ago. Greta Thunberg, a sixteen years old girl from Sweden, has marched to all over the world, even in the United Nations Head Quarter Office in New York, to make people aware and panic about climate change. Soon, her moving speech about how her generation will suffer because of this phenomenon if it is not stopped has inspired a massive number of people, old and young, to do the same activism that she does on streets. In Indonesia, the same energy has also arisen. University students from many cities made some protests to their government related to climate change at the same time protesting about the new drafts for some important legislation changes, implying that they are the same urgent agendas to be solved. This happened particularly after the big fire that destroyed Indonesian forests lately. Despite this indignance, a good friend of mine turns out having a different opinion. He said that we are doomed anyway remembering a physics theory that the Universe tends to maximize entropies. I know that theory and I perfectly understand that we cannot avoid that: we will be eaten by a black hole, collapsed to a big asteroid, unable to get any more energy because all of the stars will die, or many other possibilities. Nonetheless, I guess I would prefer to die in a beautiful and clean place in a healthy condition rather than to die after being sick for years because of inhaling too much air pollutions. When we are going to be in chaos no matter what, we can, I believe, slow down that progress by consuming things less. I will explain this idea in three examples.