is taking a bus trip sustainable?

yesterday i went to a university campus. this campus, to be exact. among all the trimmed grass, designed landscape and 'convenient' buildings, there were animal bones scattered all around. probably originated from the cafeteria garbage cans. crows and dogs were picking on the last remaining morsels of meat on the bones. it gave the otherwise sterile campus such a feeling of 'reality'. and 'unreality' as well. i don't know. it was carnal and crazy. i wish i had my camera with me. next time...