Growing algae for biofuels is an energy-intensive process that can generate more greenhouse gases than the process sequesters, according to a new study.

Examining the life cycle of algal biofuels, researchers from the University of Virginia found that the process emits high levels of greenhouse gases because algal production requires using large amounts of fertilizer.

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Between 1950 and 2008 more cars were added to our roads virtually every year as the total fleet expanded steadily from 49 million to 250 million vehicles. In 2009, however, 14 million cars were scrapped while only 10 million cars were sold, shrinking the fleet by 4 million vehicles, or nearly 2 percent. With record numbers of cars set to reach retirement age between now and 2020, the fleet could shrink by some 10 percent, dropping from the all-time high of 250 million in 2008 to 225 million in 2020.

The United States, with 246 million motor vehicles and 209 million licensed drivers, is facing market saturation. With 5 vehicles for every 4 drivers, the 4-million-vehicle contraction in the U.S. fleet in 2009 does not come as a great surprise. In a largely rural society, more cars provided mobility, but in a society that is now over 80 percent urban, more cars provide immobility.

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The headline on Tuesday’s editorial in Investor’s Business Daily – “Get the Frackin’ Gas” – is both clever and on the mark. The publication gets into trouble, however, when the body of its editorial veers into mischaracterizing ProPublica’s reporting on the environmental risks that need to be dealt with to produce the huge amounts of natural gas available underground in the United States.

Our reporters, led by Abrahm Lustgarten, have researched and written more than 50 stories on the subject over the past 18 months and are as expert on the topic as anyone in America.

Here is what is beyond dispute: The gas is highly desirable as a fuel, because it burns relatively cleanly and produces less greenhouse gas per unit of energy than oil or coal. There is lots of it obtainable within the U.S. using an enhanced version of an old drilling technology, called hydraulic fracturing or “fracking” – much more than was widely supposed just a few years ago. That means using natural gas to power cars and electrical generation doesn’t require sending huge sums abroad, weakening the dollar and strengthening countries that aren’t particularly friendly to ours – Russia, Iran and Venezuela among them.

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Climate change not only presents difficult challenges for the energy industry, but also raises serious concerns about food security as loss of topsoil and desertification reduce arable land around the world.  Within this climate, genetically-modified crops (GMOs) will play a crucial role in supporting increased development and population growth.

GMOs are organisms, such as plants and animals, whose genetic characteristics are being modified artificially in order to give them a new property.  Last month, Monsanto, the world’s leading seed producer, announced that it expects African countries to increase plantings of GMOs in order to boost food security and economic development in the face of climate change.  Africa is the only continent where per-capita food output is falling, which also raises concerns about introducing fuel-dedicated crops.  GMOs could increase yields for both food and fuel, but international and regional rules governing GMOs represent a significant barrier to increased international trade.

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U.S. researchers have demonstrated a technology that uses the sun’s heat to convert carbon dioxide and water into the building blocks of traditional fuels, a reverse combustion process that may emerge as a practical alternative to sequestration of CO2 emissions from power plants.

The prototype “Sunshine to Petrol” system, developed by Sandia National Laboratories in New Mexico, uses concentrated solar energy to trigger a thermo-chemical reaction in an iron-rich composite located inside a two-sided cylindrical chamber.

The iron oxide is designed to lose an oxygen molecule when exposed to 1,500 degree C heat, and then retrieve an oxygen molecule when it is cooled down, essentially converting an incoming supply of CO2 into an outgoing stream of carbon monoxide.

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Biofuels offer a unique opportunity for the developing world. Almost 80 percent of the remaining land that has cultivation potential resides in South America and Africa, according to research supported by the United Nations.

However, without a standard method for determining the impact of biofuels on the environment, international bodies like the U.N. will tread carefully when discussing the role of bioenergy in mitigating the effects of climate change, despite the potential economic benefits for the developing world.

The future of bioenergy from algae and bioengineered feedstocks is an exciting and promising opportunity for life science to take a larger role in sustaining our energy needs.

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By all accounts the cash for clunkers incentive program has exceeded all expectations in both volume of sales, as well as answering skeptics by getting fuel inefficient vehicles off the road.

The new vehicles being purchased average nearly 10 mpg higher, saving nearly 4 million barrels of oil per year and eliminating the production of tons of greenhouse gases.

More importantly, the program and its surrounding attention seems to have driven consumers towards hybrids and fuel efficient vehicles even more than a 50 cent spike in the price of gasoline. According to Brian Benstock, the VP and GM of Paragon Honda and Acura, the program is also introducing new customers to imports. Benstock said the program has reversed the ratio of domestic/import trade-ins at his dealership. Previously about 70 percent of his customers were trading one import (mostly Hondas) for another. Now it’s the opposite: 70 percent of people walking in the door are swapping American made autos for Hondas.

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While policy momentum behind biofuels has sputtered in recent months due in part to a slumping economy, indirect land use change debates, and life cycle studies concluding that “green” fuels cause more greenhouse gas emissions than conventional fuels, using waste as a fuel feedstock represents a promising shortcut on the path to energy security.

Waste-to-fuel is nothing new, but it remains a vastly underdeveloped alternative despite being cheap, abundant, and according to the EPA, renewable. More recently, a convergence of environmental, economic, and energy factors have bolstered the development of increasingly innovative waste-to-energy solutions.

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