What we’ve been reading this week

Every week we summarise the news stories and blogs that have grabbed our attention. We welcome your thoughts and comments on these articles.

How millions of farmers are advancing agriculture for themselves, Independent Science News.

Plant perennials to save Africa’s soils, Nature

Carbon dioxide could reduce crop yields, Max-Planck-Gesellschaft

Maize lethal necrosis (MLN) disease in Kenya and Tanzania: Facts and actions, International Maize and Wheat Improvement Centre (CIMMYT)

Commentary – Biotechnology and Africa’s strategic interests, Calestous Juma, Global Food for Thought, Chicago Council on Global Affairs

Dismay at agriculture impasse in UN climate talks, AlertNet

Commodity prices rebound on supply shortfalls, International Monetary Fund

Agriculture: A climate solution still on the sidelines, Anette Engelund-Friis, Huffington Post

Bread prices set to rise after bad weather hits UK wheat crop, The Guardian

Malawi – from agricultural success story to food crisis, How We Made it in Africa

Correction: The Stern Review

In chapter 15, the Stern Review is cited as saying that a 2°C rise in average global temperatures would reduce world GDP by an estimated 1%, as cited in an Economist article. In fact the estimated annual cost of achieving stabilisation between 500 and 550ppm CO2 equivalent is 1% of GDP. This has also been revised upwards to 2% as of 2008. The current level of CO2 in the atmosphere is just over 400ppm, a threshold reached in 2011.Without action the overall costs of climate change will be equivalent to losing at least 5% of global GDP each year.