Why!!!

Cycling between Tongue and Altnahara, enjoying the Scottish highlands. So peaceful and undisturbed. But what do I notice in the ditches near the road, bottles and cans. How is this possible, what is on the mind of people trowing these out of their cars. It is a huge problem everywhere. I saw it at the Shetlands, at the Orkneys. I see it at home, and I do not understand. This problem is the most simple issue in the whole litter problem which could be solved so easily.