R744 is the most competitive, and R744 is the most ideal when flammability and toxicity are strictly limited. There are some problems in the current R744 heating system, for example the pressure at the heat release side is often more than 10.0MPa. High operating pressure brings high cost....

Very few studies have examined the impacts of both climate change and air pollution on student education outcomes, particularly in a developing country setting. Analyzing a rich database consisting of household and school surveys, test scores, and temperature and air pollution data over the past...

Very few studies have examined the impacts of both climate change and air pollution on student education outcomes, particularly in a developing country setting. Analyzing a rich database consisting of household and school surveys, test scores, and temperature and air pollution data over the past...