Pole - and glacial melting, heavy rainfall, periods of drought, sudden weather changes with extreme hail show - climate and weather change! Caused especially by humans. Larger cities need more energy, the traffic increases. Landscape is becoming more cultural landscape. During the combustion gases are released - especially CO 2 - carbon dioxide. A greenhouse gas, oceans, plants and soils can bind. The human burns fossil fuels such as oil, coal and natural gas in large amounts. This has consequences for our climate.