“…Both entered a steep increase at around 1900, growing steeper and steeper, faster and faster. While the world population has tripled in about 100 years, we consumed around the year 2000 around 15 times the amount of energy compared to 1900 [8]. In particular the growthbased development of the recent decades was accomplished by various environmental threats such as pollution, acid rain, deforestation, the destruction of the ozone layer, climate change, etc.…”