David P. M. Zaks

TL;DR: It is shown that tremendous progress could be made by halting agricultural expansion, closing ‘yield gaps’ on underperforming lands, increasing cropping efficiency, shifting diets and reducing waste, which could double food production while greatly reducing the environmental impacts of agriculture.

TL;DR: In this article, the authors quantify the "carbon payback time" for a range of biofuel crop expansion pathways in the tropics and use a new, geographically detailed database of crop locations and yields, along with updated vegetation and soil biomass estimates, to provide carbon payback estimates that are more regionally specific than those in previous studies.

TL;DR: This work uses the MIT Emissions Prediction and Policy Analysis (EPPA) model to test the effects of a representative U.S. climate stabilization policy on the adoption of Anaerobic digesters which sell electricity and generate methane mitigation credits.

TL;DR: The question addressed in this issue of PNAS by Haberl et al. (1): Just how large is the impact of human land use on the terrestrial biosphere?

TL;DR: In this article, the relationship of climatic variables to terrestrial net primary productivity (NPP) has been investigated using a reference data set of 3023 NPP field observations for calibration and parameter optimization.