The brief summarizes an evaluation of the environmental effectiveness of Mexico's national Payments for Hydrological Services program, which compensates rural landowners for avoided deforestation. The evaluation found that ...

The release of soil carbon due to changes in land use can be a major source of greenhouse gases. This brief illustrates the distribution and scale of soil carbon in the humid tropics, an area with high concentrations of ...

Main Findings: • Health research has found consistent evidence for health impacts from polycyclic aromatic hydrocarbons (PAH), both in terms of ambient concentrations and contribution to the toxicity of particulate ...