Articles

The authors describe a process for capturing CO2 from the atmosphere in an industrial plant. The design captures ∼1 Mt-CO2/year in a continuous process using an aqueous KOH sorbent coupled to a calcium caustic recovery loop. They describe the design rationale, summarize performance of the major unit operations, and provide a capital cost breakdown developed with an independent consulting engineering firm. They report results from a pilot plant that provides data on performance of the major unit operations.

In order to make R&D funding decisions to meet particular goals, such as mitigating climate change or improving energy security, or to estimate the social returns to R&D, policy makers need to combine the information provided in this study on cost reduction potentials with an analysis of the macroeconomic implications of these technological changes. The authors conclude with recommendations for future directions on energy expert elicitations.

High cost and technical immaturity of bulk (multi-hour) electricity storage (BES) systems are often cited as major hurdles to increasing the penetration of intermittent renewables. The authors use a simple model to assess the economics of BES under carbon emissions constraints.

Energy technology innovation is the key to driving the technological changes that are necessary to meet the challenge of mitigating energy-related greenhouse gas emissions to avoid 'dangerous climate change.' Success in innovation requires the enhancement of public investment in the innovation process, the creation of markets for low-carbon technologies through stronger climate policies, and a continued focus on energy access and equity.

Energy transitions are an unmistakable part of today's public discourse. Whether shaped by fuel price flux, environmental and security concerns, technology change, or goals to improve energy access, attention turns to ways in which to improve energy pathways. Yet what is understood about energy system change is still emerging. This article explores the evolving field of energy transitions with an aim to connect and enlarge the scholarship.

"There is an equally revolutionary alternative that Ziegler does not acknowledge: empowering the poor by building their capacity to address hunger through improved agricultural practices, training of farmers, better infrastructure and access to markets."

In this new lead article, Prof. Calestous Juma, Harvard University and Prof. Yee-Cheong Lee, UNESCO, reflect on the progress made since the UN Millennium Project's Task Force report on science, technology and innovation (ST&I) was published. In 2005, the Task Force released the report Innovation: applying knowledge in development. It outlined a number of ways in which ST&I could be used to realize the UN Millennium Development Goals (MDGs). The authors claim that the report has played a key catalytic role in raising global awareness of the importance of ST&I in development.

Africa is yet to adopt full scale technology-led development. Steve Mbogo spoke to the Director of the Belfer Center's Science, Technology, and Globalisation Project and professor at Harvard University Calestous Juma on the opportunities that await the continent as a late comer.