Emissions of nitrogen oxides (NOx) from aircraft cause air quality degradation and climate change. Use ultra-low sulfur fuel along with post-combustion emissions control results in a net benefit 304 USD per metric tonne jet burned.

This study used mesocosms to examine the effects of alternate drying and rewetting on CO2 and CH4 emissions from high-altitude peatlands on the Tibetan Plateau. The drying and rewetting experiment conducted in this study included three phases: a 10-day predrying phase, a 32-day drying phase, and an 18-day rewetting phase. During the experiment, the water table varied between 0 and 50 cm with re...

the Tropics. Substrate availability as a primary control on methane emissions is a viable hypothesis, but I feel the paper would be enhanced by a more thorough analysis and discussion of alternative controllers on the seasonality of net CH4 emissions to the atmosphere. It seems possible that the decay constant the authors infer could be explained by other processes with comparable temporal vari...