i figured out the business of survival is mental construction caused by the civilization that makes everything about money. now we have to survive without nature, against nature, we have to live by money and survive the predations of toxic business. 
i figured out these blocks lined the lake and were removed and replaced by concrete, which is steadily crumbling. they dump asphalt other construction waste as land fill where the concrete seawall erodes. erosion is the process that begins in construction.