Forest soils are an important source of nitrous oxide (NO), however, field observations of NO emission have often exhibited large variabilities when compared with managed agricultural lands. In the last decade, the number of forest NO studies has increased more than tenfold, but only a few of them have looked into the interannual flux variabilities from the regional scale. Here, we have collected 30 long-term NO monitoring studies (≥ 2 years) based on a global database, and extracted variabilities (VAR) as well as relative variabilities (VAR, in proportions) of annual NO fluxes.
View Article and Find Full Text PDFFood waste is of great concern because it causes severe environmental pollution during disposal and contains many resources that should be well managed. Food waste quantification could clarify the resource value of wasted food and thus help to improve resource utilization efficiency, reduce water eutrophication potential, and reduce greenhouse gas emissions. By considering household food waste, out-of-home food waste, and food delivery waste in rural and urban regions, this paper quantifies the nitrogen, phosphorus, water, and carbon footprint embedded in China's food waste at the provincial level.
View Article and Find Full Text PDF