I am sure all of us at one time or another have taken a walk down a nature trail and found a bit of trash that stood out among the plants or on the path. More often than not the 
item is recognized almost instantaneously by its color scheme, shape or material combination – its branding.
We may be irritated by the unsightliness, we may not give it a second thought and meditatively and instinctively pick up the litter for proper disposal later, or we may keep walking. This time of year in a deciduous wood with only brown dried leaves on the ground, even a small item may stand out. Among more urban landscape the litter might just be part of the environs along the roadside or highway entrance. We may scarcely notice it while zipping by in our automobiles. Yet litter as a collection of transactions is quite complex and the pathways that result in the deposited item in places other than the trash bin are many. The composition of the litter too is quite diverse and context specific.
