Ausubel has analysed the amount of energy that each so-called renewable source can produce in terms of Watts of power output per square metre of land disturbed. He also compares the destruction of nature by renewables with the demand for space of nuclear power. "Nuclear energy is green," he claims, "Considered in Watts per square metre, nuclear has astronomical advantages over its competitors."
On this basis, he argues that technologies succeed when economies of scale form part of their evolution. No economies of scale benefit renewables. More renewable kilowatts require more land in a constant or even worsening ratio, because land good for wind, hydropower, biomass, or solar power may get used first.
A consideration of each so-called renewable in turn, paints a grim picture of the environmental impact of renewables. Hypothetically flooding the entire province of Ontario, Canada, about 900,000 square km, with its entire 680,000 billion litres of rainfall, and storing it behind a 60 metre dam would only generate 80% of the total power output of Canada's 25 nuclear power stations, he explains. Put another way, each square kilometre of dammed land would provide the electricity for just 12 Canadians.
Biomass energy is also horribly inefficient and destructive of nature. To power a large proportion of the USA, vast areas would need to be shaved or harvested annually. To obtain the same electricity from biomass as from a single nuclear power plant would require 2500 square kilometres of prime Iowa land. "Increased use of biomass fuel in any form is criminal," remarks Ausubel. "Humans must spare land for nature. Every automobile would require a pasture of 1-2 hectares."
Turning to wind Ausubel points out that while wind farms are between three to ten times more compact than a biomass farm, a 770 square kilometre area is needed to produce as much energy as one 1000 Megawatt electric (MWe) nuclear plant. To meet 2005 US electricity demand and assuming round-the-clock wind at the right speed, an area the size of Texas, approximately 780,000 square kilometres, would need to be covered with structures to extract, store, and transport the energy.
One hundred windy square metres, a good size for a Manhattan apartment, could power an electric lamp or two, but not the laundry equipment, microwave oven, plasma TV, and computer. New York City would require every square metre of Connecticut to become a wind farm to fully power all its electrical equipment and gadgets.
Solar power also comes in for criticism. A photovoltaic solar cell plant would require painting black about than 150 square kilometres plus land for storage and retrieval to equal a 1000 MWe nuclear plant. Moreover, every form of renewable energy involves vast infrastructure, such as concrete, steel, and access roads. "As a Green, one of my credos is 'no new structures' but renewables all involve ten times or more stuff per kilowatt as natural gas or nuclear," Ausubel says.
While the full footprint of uranium mining might add a few hundred square kilometres and there are considerations of waste storage, safety and security, the dense heart of the atom offers far the smallest footprint in nature of any energy source. Benefiting from economies of scale, nuclear energy could multiply its power output and even shrink the energy system, in the same way that computers have become both more powerful and smaller.
"Renewables may be renewable but they are not green," asserts Ausubel", If we want to minimize new structures and the rape of nature, nuclear energy is the best option."
Dispersal of Fish Eggs by Water Birds – Just a Myth?
19.02.2018 | Universität Basel
Removing fossil fuel subsidies will not reduce CO2 emissions as much as hoped
08.02.2018 | International Institute for Applied Systems Analysis (IIASA)
So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics
Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...
The historic first detection of gravitational waves from colliding black holes far outside our galaxy opened a new window to understanding the universe. A...
A team led by Austrian experimental physicist Rainer Blatt has succeeded in characterizing the quantum entanglement of two spatially separated atoms by observing their light emission. This fundamental demonstration could lead to the development of highly sensitive optical gradiometers for the precise measurement of the gravitational field or the earth's magnetic field.
The age of quantum technology has long been heralded. Decades of research into the quantum world have led to the development of methods that make it possible...
Cardiovascular tissue engineering aims to treat heart disease with prostheses that grow and regenerate. Now, researchers from the University of Zurich, the Technical University Eindhoven and the Charité Berlin have successfully implanted regenerative heart valves, designed with the aid of computer simulations, into sheep for the first time.
Producing living tissue or organs based on human cells is one of the main research fields in regenerative medicine. Tissue engineering, which involves growing...
A team of scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg investigated optically-induced superconductivity in the alkali-doped fulleride K3C60under high external pressures. This study allowed, on one hand, to uniquely assess the nature of the transient state as a superconducting phase. In addition, it unveiled the possibility to induce superconductivity in K3C60 at temperatures far above the -170 degrees Celsius hypothesized previously, and rather all the way to room temperature. The paper by Cantaluppi et al has been published in Nature Physics.
Unlike ordinary metals, superconductors have the unique capability of transporting electrical currents without any loss. Nowadays, their technological...
02.05.2018 | Event News
13.04.2018 | Event News
12.04.2018 | Event News
18.05.2018 | Power and Electrical Engineering
18.05.2018 | Information Technology
18.05.2018 | Information Technology