Many of us were among the 87 civil society organizations from around the world that sent you, in December 2010, a statement of concern regarding the field release of genetically modified (GM) Aedes aegypti mosquitoes in Malaysia. At the time, we had stated that it was not clear when such releases would occur, but given the tremendous international interest in the issue, it would be regrettable if the field trials were to be shrouded in secrecy.

As civil society organizations from around the world, we write to you to respectfully put forward our views on the issue of the release of genetically modified (GM) Aedes aegypti mosquitoes in Malaysia. It is not clear when such releases will occur, but given the tremendous international interest in the issue, it would be regrettable if the field trials were to be shrouded in secrecy.

Discussions on funding, financial targets and innovative financial mechanisms were extremely difficult during the COP10 in Nagoya in October 2010 and clearly revealed the divide between North and South. They also reflect a wider struggle going on over the effectiveness and implications of market‐oriented approaches to the three Rio Conventions, including biodiversity conservation. This struggle that is going to be central for "Rio+20", the 2012 United Nations Conference on Sustainable Development where 'green economy' is one of the two main topics on the agenda.

With next year’s Rio+20 Earth Summit due to meet in the ‘biofuel republic of Brazil’ it is little wonder that the fights over agrofuels will be intensifying in the years ahead. UNEP’s flagship ‘Green Economy’ study published last month appears to bless a massive expansion of agrofuel – advocating for over a fifth (21.6%) of all liquid fuels to be bio‐based by 2050. Sourcing all that biological feedstock is a feat that even UNEP admit will gobble up over a third (37%) of global agricultural and forest ‘residues’ – a hefty take from already overstressed ecosystems.

At the recent preparatory conference for Rio+20 in New York (7-8th March) it became clear that the “green economy” concept is complicating an already difficult process. Definitions of sustainable development have been argued over for years; now we are invited instead to see everything in terms of a “green economy”. UNEP, which produced its massive economics-dominated report shortly before the prepcom/conference, defines the “green economy” as one that results in improved human wellbeing and social equity, while significantly reducing environmental risks and ecological scarcities.

Agrofuel production involves the artificial creation of a new market with the help of government incentives, targets and subsidies. These are necessary because agrofuels cannot compete without them, so they need support in order to develop. However, it is clear that these supportive measures, including the EU target, are already impacting the global South. They are contributing to land seizure, speculation and rising land prices in Africa, Asia and South America.

This article reviews and discusses biochar with particular reference to the book Biochar for Environmental Management - Science and Technology’, edited by Johannes Lehmann and Stephen Joseph, Earthscan 2009.

Biochar is biomass burned in the near absence of oxygen and it is basically identical to charcoal, but used for different purposes. It is being widely promoted by various interests as a soil amendment and to sequester carbon, often with little detailed argument or evidence in support of the claims made. The book "Biochar for Environmental Management" provides of a large collection of articles about biochar by a total of some 50 researchers and specialists from a wide range of universities, government departments and companies. It demonstrates clearly that there are major gaps in knowledge. However, at the same time, some writers speak of biochar as a means to address climate change and propose it for carbon markets, in spite of these knowledge gaps.

The Precautionary Principle advises society to be cautious about a technology or practice where there is scientific uncertainty, ignorance, gaps in knowledge or the likelihood of outcomes we did not predict or intend. It runs counter to the optimistic notion that any negative impacts from a technology can be addressed and may provide an opportunity to develop new solutions, so contributing to economic growth. The US Chamber of Commerce dislikes the precautionary approach and prefers: “the use of sound science, cost-benefit analysis, and risk assessment when assessing a particular regulatory issue.” Its strategy is therefore to: “Oppose the domestic and international adoption of the precautionary principle as a basis for regulatory decision making.”

Three activities – no-till agriculture, biochar and more intensified livestock farming with reduced methane emissions – are likely to benefit from increased funding because of their alleged role in combating global warming. What is the evidence that these activities can reduce greenhouse gas emissions? What will happen to the world’s biodiversity and the global climate if these sectors are hugely expanded? And who is likely to benefit?

We believe that serious damage being done in the global south by the EU biofuel target and that sustainability criteria are completely inadequate to address this.