As is vividly revealed in the drawing above, a bear and a penguin are forced to hug each other on one of the last pieces of ice-lands left due to global warming caused by carbon emission.
During the forced aeration composting with swine manure and bran, the characteristics of nitrogen transformation and NH3 emission are studied.
研究在猪粪、米糠强制通风堆肥过程中，堆体中氮素转化特点和NH3挥发规律。
3
To comply with these regulations, automakers are being forced to develop ultra low-emission engine systems by optimizing combinations of technologies related to combustion, aftertreatment and fuel.