This document provides details about an individual's personal study on how humans have affected nature. It discusses three artists - Nils Udo, Anselm Kiefer, and Alan Sonfist - that incorporate themes of human impacts on the environment in their work. For each artist, it analyzes specific art pieces through descriptions of materials, dimensions, and interpretations of meaning. The study aims to gain ideas for practical work by exploring different techniques used by the artists to represent human effects like global warming, deforestation, and pollution.