Feature Article

Global food demand is increasing rapidly, as are the environmental impacts of agricultural expansion. Here, we project global
demand for crop production in 2050 and evaluate the environmental impacts of alternative ways that this demand might be
met. We find that per capita demand for crops, when measured as caloric or protein content of all crops combined, has been a
similarly increasing function of per capita real income since 1960. This relationship forecasts a 100–110% increase in global crop demand from 2005 to 2050.

One approach to reducing the costs of advanced biofuel production from cellulosic biomass is to engineer a single microorganism to both digest plant biomass and produce hydrocarbons that have the properties of petrochemical fuels. Such an organism would require pathways for hydrocarbon production and the capacity to secrete sufficient enzymes to efficiently hydrolyze cellulose and hemicellulose.

For centuries, traditional agricultural systems have contributed to food and livelihood security throughout the world. Recognizing the ecological legacy in the traditional agricultural systems may help us develop novel sustainable agriculture. We examine how rice–fish coculture (RF), which has been designated a “globally important agricultural heritage system,” has been maintained for over 1,200 y in south China.

Our ability to manage gene flow within traditional agroecosystems and their repercussions requires understanding the biology of crops, including farming practices' role in crop ecology. That these practices' effects on crop population genetics have not been quantified bespeaks lack of an appropriate analytical framework. We use a model that construes seed-management practices as part of a crop's demography to describe the dynamics of cassava (Manihot esculenta Crantz) in Cauca, Colombia.

In the Amazon rainforest, there is a fine balance between efforts to prevent deforestation and the desire to clear the trees for agriculture. It says much about this tension that spikes in forest loss in Brazil earlier this year have been attributed to nothing more tangible than a perceived shift in where the country's politicians intend to draw the line between the two.

The right to the city, an idea mooted by French radical philosophers in 1968, has become a popular slogan among right to housing activists and inclusive growth policymakers. In Indian cities unprecedented and unregulated growth, incremental land use change, privatisation and chaotic civic infrastructure provisioning are fracturing resources created over centuries and reducing the right to the city to mere right to housing and property, thus short-changing the concept’s transformative potential.

Mumbai is in reality a city of places that are not a part of the current set of fantasies that rule the minds of urban planners but are yet integrally linked to capitalist processes, to urban practices of place-making and to urbanism itself. From this perspective, this enquiry seeks not only to better understand and explain the processes that are forcing out the city’s less privileged from its commons, but also imagine how a more inclusive future could be achieved.

This article traces the shifting visibility of the river Yamuna in the social and ecological imagination of Delhi. It delineates how the riverbed has changed from being a neglected “non-place” to prized real estate for private and public corporations. It argues that the transformation of an urban commons into a commodity is not only embedded in processes of political economy, but is also driven by aesthetic sensibilities that shape how ecological landscapes are valued.

From an understanding of the commons as a rural artefact, the concept has expanded to include urban spaces and practices. The destruction of common resources and the communities that depend upon them is a long-standing outcome of capitalist expansion. It is also a cause for concern, given the ultimate centrality of the commons to the reproduction of urban populations and ecosystems.