Still rising energy prices and a more accurate okosystem clarifies the need for efficient alternatives to fossil fuels
Every year the "Energy hunger" the global evolution of immensely and demand for sufficient and secure energy supply is steadily increasing. The far large proportion of energy production is based today on the burning of fossil energy carrier coal, mineralol and gas. The uncertainties of the productive energy supply due to the increasing shortage of the fossil preference, thus the rising danger of humans and the environment through the combustion products, the worry of a secured future.
Due to the use of modern technology, while efficiencies and environmental contracts can be increased and thereby reduces emissions, they can be prevented completely so they can not be prevented. Climate change and concern for global world warming plays an increasingly important role in addition to security of supply.
Against the background of global efforts to reduce anthropogenic greenhouse gas emissions, in addition to the energy saving of the expansion of renewable energy production energy production, the most important element is. The renewable energies must form the basis for the future energy supply. At the same time, it is committed to developing methods with which the CO2 already released for many decades is to be collected again, so that the temperature above resulting from the higher CO2 content of the atmosphere remains in profitable limits.
All methods of geo-engineering engage in coarse mass in the natural drainage of biosphare. Artificial methods require a lot of energy and often have unintentional side effects. Natural methods, on the other hand, are based on the increase of natural places that man has gone. So you try to stimulate algae growth by fertilization with iron salts to bind additional CO2, which should then sink with the biomass on the ground of the ocean. Coarse-bearing attempts have shown that the desired effect does not enter the scope as it is upgraded to reduce the CO2 in the air and in the sea. Worldwide, many millions of tree are planted, which bind the CO2. As compensation to the same time destriction of the natural rainforder, however, is far from sufficient.
With 200 kg corn one can serve a person for a whole year, but only 50 liters of bioethanol produce
The generation of energy from the sun, wind, water and biomass is becoming increasingly important. The combined use of solar energy with the cultivation of energy crops can take a massive role in this energy mix. For some time titles magazines rhetorical art handles like "Full tank or full of plates", which probably explains the impression of an alternativeity1. The question may not be: "Who do I take the food away, so I can drive a car?" She has to live: "Where do I find agricultural flats for the cultivation of herbal energy carrier without competing for food or privately rated ur forest?"
A functioning alternative, however, already described Ernst Schrimpff2 in the magazine humane economy (Nov / Dec. 2005), in which plant sol was discussed as a future fuel. Combining this idea with the DESERTEC project of TREC (Trans-Mediterranean-Energy Corporation), which involves all the medement of the medement of the Mediterranean, shows how to use solar energy not only electricity, but also drinking water.
The German company for aerospace (DLR) has already calculated and published under the name Aquasol. In the case of a corresponding expansion of the solar power plants and desalination systems, there is also perfect water for growing energy-equivalent plants. The problem of biofuels is that today preferably intact agricultural surfaces are built with energy carriers, rather than as before with food plants.
Either from food fuel is obtained, as in USA from corn ethanol – or there are flat food production, as the production of Palmol, as in Africa, where multinational agricultural corporations rely on the flat and to shorten the locals food production. So in Tanzania already almost 641170 ha fruitful farmland for the cultivation of energy plants has been released3. Was grown on this flat maize, there could grow 1200-5000 kg / ha depending on the ground, weather and sunrung. Consider that 200 kg of maize can drive a person to renew a whole year, but only for the production of 50 liters bioethanol, you see how many people you take the food.
The prices for food has already doubled since 2000 to 2008, the prices for plantol (soy, rapes, sunflower and palmol) have risen to 3.5 times. In Sudostasien, Brazil and Africa, Urwald is scanned to grow palmol or sugar cane. With the rotod, so much CO2 is released that it takes more than 80 years until this amount is collected from the plants44. The flat in the EU, which were shut down for over-production a few years ago, are again under the plow to produce rapsol, sunflowerenol, maison silage for biogas or other biomass for burning5.
But even if you worked the complete arable flat in Germany for fuel production, you only received approx. 18% of the gasoline and diesel added in Germany. Our energy hunger is still too rough. It should be foreseen that the amount of crude required in 10 years is much lower than today7. Of the currently 50 million cars in Germany, maybe 1 million with electricity will be driven at this time8. This is a matter of political will.
For the steady cars and trucks, ships and aircraft we need a replacement fuel. Often, hydrogen is discussed as a smooth fuel, but is first of all of the energy density less suitable as a plant solder and secondly for foreseeable time by a multiple expensive per kWh. For planes, a drive with hydrogen is hardly conceivable. First attempts showed that the half of the passenger space was needed for the H2 tank. Electrical energy leaves as long as no energy storage with equal high energy density is available. It is hardly imaginable that many Germans were ready to starve to drive car. However, the majority of population is probably unaware that then some African has to starve because the imported biofuels expand the food in the developing policies.