Large areas of land in the developing world are being converted to grow crops such as sugar cane and palm oil as part of the global rush to make biofuels which are widely thought to produce less carbon dioxide than conventional transport fuels.
But scientists at the University of Leeds and the World Land Trust have found that up to nine times as much carbon dioxide will be emitted using biofuels compared to conventional petrol and diesel because biofuel crops are typically grown on land which is burnt and reclaimed from tropical forests. The report concludes that protecting and restoring natural forests and grasslands is a much better way to reduce carbon dioxide emissions.
Study co-author Dominick Spracklen of the School of Earth and the Environment at the University of Leeds says: "This study shows that if your primary concern is reducing carbon dioxide emissions, growing biofuels is not the best way to do it.
“In fact it can have a perverse impact elsewhere in the world. The amount of carbon that is released when you clear forests to make way for the biofuel crop is much more than the amount you get back from growing biofuels over a 30-year period.
"You can't convert your car to run on biofuel and keep on driving and think that everything will be OK. You are turning a blind eye to what's happening around the world and that in fact, you could be making things much worse."
The report is co-authored by Renton Righelato of the World Land Trust - a charity that protects and restores threatened habitats around the world – and is published in Science this month.
The study compared the amount of carbon dioxide emissions that would be saved from entering the atmosphere by growing biofuels with the amount saved from slowing deforestation and restoring forests over a 30-year period.
The study also found that converting large areas of land back to forest provides other environmental benefits such as preventing desertification and regional climate regulation. The conversion of large areas of land to make biofuels will place further strains on the environment, the study concluded.
European Union member states have pledged to replace 10% of transport fuel with biofuel from crops by 2020 in an effort to reduce reliance on imported oil and reduce carbon dioxide emissions. Meeting the EU target would require an area larger than one third of all the agricultural land in Europe to be used for growing biofuel crops.
But Spracklen says that conserving existing forests and savannahs and restoring forests and grasslands is a better way to help save the planet.
He says: "There is a big push in the EU and US to promote biofuels as a way to reduce carbon dioxide emissions. What we do here has an impact on the rest of the world. Although biofuels may look a good idea in places like Europe, they have a perverse effect when you take into the rest of the world."
Guy Dixon | alfa
WAKE-UP provides new treatment option for stroke patients | International study led by UKE
17.05.2018 | Universitätsklinikum Hamburg-Eppendorf
First form of therapy for childhood dementia CLN2 developed
25.04.2018 | Universitätsklinikum Hamburg-Eppendorf
The more electronics steer, accelerate and brake cars, the more important it is to protect them against cyber-attacks. That is why 15 partners from industry and academia will work together over the next three years on new approaches to IT security in self-driving cars. The joint project goes by the name Security For Connected, Autonomous Cars (SecForCARs) and has funding of €7.2 million from the German Federal Ministry of Education and Research. Infineon is leading the project.
Vehicles already offer diverse communication interfaces and more and more automated functions, such as distance and lane-keeping assist systems. At the same...
A research team led by physicists at the Technical University of Munich (TUM) has developed molecular nanoswitches that can be toggled between two structurally different states using an applied voltage. They can serve as the basis for a pioneering class of devices that could replace silicon-based components with organic molecules.
The development of new electronic technologies drives the incessant reduction of functional component sizes. In the context of an international collaborative...
At the LASYS 2018, from June 5th to 7th, the Laser Zentrum Hannover e.V. (LZH) will be showcasing processes for the laser material processing of tomorrow in hall 4 at stand 4E75. With blown bomb shells the LZH will present first results of a research project on civil security.
At this year's LASYS, the LZH will exhibit light-based processes such as cutting, welding, ablation and structuring as well as additive manufacturing for...
There are videos on the internet that can make one marvel at technology. For example, a smartphone is casually bent around the arm or a thin-film display is rolled in all directions and with almost every diameter. From the user's point of view, this looks fantastic. From a professional point of view, however, the question arises: Is that already possible?
At Display Week 2018, scientists from the Fraunhofer Institute for Applied Polymer Research IAP will be demonstrating today’s technological possibilities and...
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...
25.05.2018 | Event News
02.05.2018 | Event News
13.04.2018 | Event News
25.05.2018 | Event News
25.05.2018 | Machine Engineering
25.05.2018 | Life Sciences