What is something that really makes you angry?

Candidly, I rarely get angry. However, one of the things that makes me angry is when someone litters. Its gathers tention into the atmosphere because garbage cans aren't meaningless. Someone invented the garbage can for a reason: to put trash in. It gets to me because it seems like people are careless about our planet.
The planet already have an atrocious case of pollution. Why make it even more abominable to put trash in places it shouldn't be in. Everytime I see someone litter, especially when it comes to my friends, I start fussing at them because for some odd reason, a garbage can always are nearby. Now, why is it necessary to throw trash on the ground, when it is a grabage can you can place your trash in a few feet away?

I never understood the scenario when its necessary to litter. It would be more appreciated if trash is placed in the trash can, rather than the floor. Lets try to keep our planet clean so it can last longer. It would be more efficient if everyone would put the garbage can to use.