Yesterday's sunshine today

One of the things you get on large building sites is mounds of earth, hundreds of tons of it as big as a small hillside. Topsoil, sometimes contaminated, which has been bulldozed and excavated ends up being deposited away from the main construction area, often only to be moved on again six months or a year later when it's in the way again andeventually levelled and landscaped. If left undisturbed though for long enough it invariably becomes intensely overgrown.