Ecological Engineering Methods (also known as Biological Engineering or ECO-Engineering) is when researchers try to tap biologically-based energy sources. Some projects include engineering new organisms that produce hydrogen from water and sunlight in environmentally friendly ways with no waste products, and transforming the way man interacts with the environment. One of the more familiar techniques of ECO-Engineering is Bioremediation. Using oil-eating bacteria created by Eco-Engineering, Bioremidiation is applied to oil spills and chemical spills worldwide.
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We have to distinguish between Primary and Secondary methods of producing energy. Making hydrogen from water by electrolysis will use more energy than is available in the hydrogen, because processing always has nonzero wastage. When the hydrogen is produced there are all the emissions for generating electricity from fossil fuels for electrolysis, but when the hydrogen is used in automobiles as fuel the automobiles will emit harmless water vapour. If power is made from fossil fuels, then the hydrogen automobile fuel, as a whole, causes even more emissions than directly burning fossil fuels in automobiles.
The trick is that if we use non-chemical Primary fuels, like Solar energy or Nuclear energy, then the complete process is less polluting.
As long as fossil fuels are used for producing hydrogen, the only benefit is that, although it produces even more emissions, these emissions are near Power Generating Stations, which can be kept away from urban areas. Earth as a whole suffers more emissions than without use of hydrogen automobile fuel.
Emission control implies control on use of fossil fuels. The fossil fuels can produce greenhouse gases, such as carbon dioxide and others. So, we need to control the use of fossil fuels, because they can harm our world. We can use petrol without plumbum (unleaded gasoline) because this petrol does not release the smoke that can pollute our environment.
Nuclear or solar energy can be used to actively capture greenhouse gases from the atmosphere and convert them into non-polluting chemical compounds, in other words, to convert atmospheric carbon dioxide into solid carbon and gaseous oxygen. Earth will get more heat (waste heat of the nuclear power station, and energy consumption of the processes, minus the internal energy added to carbon and oxygen when chemically separating them out of the carbon dioxide). Also, the removed carbon dioxide will reduce it in the atmosphere. Instead of direct chemical reactions, the capture could be done by biological means, accelerated with help of nuclear energy. In other words, air separation plants could run on nuclear energy, capturing liquid or solid carbon dioxide. Then, possibly, chlorophyll-containing genetically modified algae could be used to convert it into fixed carbon compounds. We could have an interim technology of spraying microspheres loaded with algae into the open atmosphere from aircraft or even balloons. If the microspheres were small enough, these could remain in the air for long times, and go on converting carbon dioxide with help of direct solar energy.
The technology of artificially accelerated reduction of already emitted green house gases is as yet unexplored but is theoretically possible.
Traditional engineering use the concrete [overshoes?] to compensate the flaws which have mentioned above, but this method can not really reinforce the natural environment’s power—over-using the concrete [overshoes?] can enlarge the destruction for natural environment. Recently, the new method, Ecological Engineering Methods, has been invented, so the nature-working method engineer has attracted people’s attention, respect and broad application. Moreover, nature-working method engineer notice the importance of the environment protection, soil and water conservation, and reduction and protection for the natural calamity, thus, people can maintain the sustainable exploitation permanently.