It is hard to say what concerns me the most but I realize that I am very concerned about the oceans (plastic pollution and warming oceans). If the oceans keep getting warmer and coastlines keep inching further and further inland each year, theoretically we could be fully ocean eventually with no land at all. As we know, already there are islands like Tuvalu in the Pacific that are getting smaller and smaller each year. I am also very concerned about the ocean creatures. Some of these creatures have been around for hundreds of millions of years and it saddens and angers me to know that they are going extinct every day. So I guess what concerns me the most would be our reliance and use of fossil fuels. Plastics and global warming in particular are very concerning to me.