I would say that "constant cry" and "Chesterton's cat" are the obvious ones. However "echoed in our ears" is a pretty subtle one that you can definitely make a solid argument for.
the first one because it shows how massive our amount of garbage is and will be in the future
Technically since it says in your own words, this is cheating, lets not cheat! finding the theme is simple, just ask yourself, what was the ppoint, its not asking you to summarize so dont say that this happened then this happened, nope just simply state the purpose of the article! hope i helped!
