The team found that electric power plants -- which release sulfur dioxide -- were the biggest contributor to deaths related to pollution from other states.

研究小组发现，释放二氧化硫的发电厂是造成其他州与污染相关死亡的最大原因。

Oil competes with coal and nuclear power as an energy source for electric power plants.

作为发电厂的能源，石油与煤炭和核电竞争。

Increased federal regulations of electric power plants have made it tougher to meet EPA guidelines burning only coal.

对发电厂的联邦法规的增加使得满足 EPA 仅燃烧煤炭的指导方针变得更加困难。

And most of this water is actually used to grow crops; approximately 500 billion litres of freshwater is used daily for agriculture in the USA alone, with another 500 billion litres to cool electric power plants.

而这些水的大部分实际上用于种植农作物；仅在美国，每天大约有 5000 亿升淡水用于农业， 另外还有 5000 亿升用于冷却发电厂。