One way out of the dilemma could be to allow higher sulfur emissions in sparsely populated areas where the soil is not vulnerable to acidification. Here, emissions from ship traffic on the open seas come to mind.
解决难题的办法之一是在人烟稀少的地区允许更多硫的排放，因为那里的土壤不那么容易酸化。公海上航行的船只是个很容易想到的例子。但这或许不是一个可行的选择。