The emission of sulfur dioxide when high-sulfur coal is burned is restricted by law.

高硫煤燃烧过程中的二氧化硫的排放是受到法律限制的。

youdao

The results manifested that the floatation effect of BET is better than that of other common floatation reagents and has a higher selectivity especially in high-sulfur coal sample floatation.

实验结果表明，BET的浮选效果要优于普通煤用浮选药剂，尤其是用于高硫煤的浮选时，它有很强的选择性。

youdao

The high sulfur content of its sour crudes makes it different to yield the light products that meet the increasingly stringent environment standards.

酸性原油的高硫含量可产生特殊的轻油产品，符合日益严峻的环境需求。

youdao

As a result, U.S. refiners have continued to produce large amounts of high-sulfur diesel.

FORBES: Magazine Article

What it does have (and must have, as a starting point for the diamonds) is lots of coal: dirty, high-sulfur-content coal, which feeds 75% of the country's primary energy requirements.

FORBES: Hitting The Gas

In other words, U.S. refiners are exporting U.S. high-sulfur distillates instead of refining it into low-sulfur diesel fuel than can be sold in the U.S. Chile, Mexico and several other countries in Central America have been the leading export markets for high-sulfur U.S. diesel.

FORBES: America's Oil Export Problem (Yes, Export)