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Add Desert 'carbon Farming' To Curb CO2

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<br>Desert 'carbon farming' to curb CO2<br>
<br>1 August 2013<br>
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<br>By Matt McGrath<br>
<br>Environment correspondent, BBC News<br>
<br>Scientists say that planting great deals of jatropha trees in desert areas might be an effective way of curbing emissions of CO2.<br>
<br>Dubbed "carbon farming", scientists state the idea is financially competitive with modern carbon capture and storage tasks.<br>
<br>But critics state the idea could be have unforeseen, unfavorable effects including increasing food costs.<br>
<br>The research study has actually been released, external in the journal Earth System .<br>
<br>Seeds of modification<br>
<br>Jatropha curcas is a plant that came from Central America and is effectively adapted to severe conditions including exceptionally dry deserts.<br>
<br>It is already grown as a biofuel, external in some parts of the world due to the fact that its seeds can produce oil.<br>
<br>In this research study, German scientists revealed that a person hectare of jatropha might record as much as 25 tonnes of carbon dioxide from the environment every year. The researchers based their price quotes on trees currently growing in trial plots in Egypt and in the Negev desert.<br>
<br>"The results are overwhelming," stated Prof Klaus Becker, from the University of Hohenheim in Stuttgart.<br>
<br>"There was excellent growth, an excellent response from these plants. I feel there will be no issue trying it on a much bigger scale, for instance ten thousand hectares in the start," he stated.<br>
<br>According to the researchers a plantation that would cover three percent of the Arabian desert would absorb all the CO2 produced by cars and trucks and trucks in Germany over a twenty years duration.<br>
<br>The scientists state that a critical aspect of the plan would be the accessibility of desalination facilities. This suggests that initially, any plantations would be confined to coastal areas.<br>
<br>They are hoping to develop larger trials in desert locations of Oman or Qatar. Prof Becker says that unlike other schemes that just offset the carbon that people produce, the planting of jatropha might be an excellent, short-term solution to environment modification.<br>
<br>"I believe it is a good concept since we are actually drawing out co2 from the atmosphere - and it is entirely different in between extracting and avoiding."<br>
<br>According to the researcher's calculations the costs of curbing co2 via the planting of trees would be between 42 and 63 euros per tonne. This makes it competitive with other methods, such as the more high tech carbon capture and storage, external (CCS).<br>
<br>A number of countries are presently trialling this technology, external but it has yet to be deployed commercially.<br>
<br>Growing jatropha not just soaks up CO2 but has other advantages. The plants would help to make desert areas more habitable, and the plant's seeds can be gathered for biofuel say the scientists, providing a financial return.<br>
<br>"Jatropha is perfect to be become biokerosene - it is even much better than biodiesel," stated Prof Becker.<br>
<br>But other professionals in this area are not encouraged. They point to the fact that in 2007 and 2008 big numbers of jatropha trees were planted for biofuel, specifically in Africa. But many of these ventures ended in tears,, external as the plants were not very effective in dealing with dry conditions.<br>
<br>Lucy Hurn is the biofuels campaign manager for the charity, Actionaid. She states that while jatropha was once seen as the excellent, green hope the reality was very different.<br>
<br>"When jatropha was introduced it was viewed as a wonder crop, it would grow on scrubland or marginal land," she stated.<br>
<br>"But there are frequently individuals who need limited land to graze their animals, they are getting food from that area - we would not class the land as marginal."<br>
<br>She explained that jatropha is extremely toxic and can contaminate the land it is grown on, even in a desert. And she likewise had issues about the fairness of the concept.<br>
<br>"It is still somebody else's land. Why enter and grow these enormous plantations to handle an issue these people didn't really trigger?"<br>
<br>Follow Matt on Twitter, external.<br>
<br>More on this story<br>
<br>'Carpets of seaweed' grown for fuel. Video, 00:03:05'Carpets of seaweed' grown for fuel<br>
<br>1 July 2013<br>
<br>Biofuels are 'illogical technique'<br>
<br>Published<br>
<br>15 April 2013<br>
<br>Related internet links<br>
<br>Universität Hohenheim<br>
<br>European Geosciences Union<br>
<br>The BBC is not responsible for the material of external sites.<br>