Human life and prosperity directly depend upon continued availability of natural resources, true synthetic resources being few and have unlimited production. Natural resources can be non-renewable, like fossil fuels (coal, mineral oil, natural gas, geothermal energy), minerals and nuclear energy, they cannot be replaced and are replenishing. Renewable resources, like biodiversity (agricultural crops, livestock, wildlife, forests, fisheries, etc.), sun energy, wind, water, soil, cannot be replenished as they are replaceable. Natural resources appeared unlimited when the human population and its demands were limited, but with the recent increase in the human population and its increasing demands in this era of science and technology the natural resources started falling short of the human demands, resulting in ever increasing prices, malnutrition, hunger, socio-economic problems and ultimately political crises.