These requirements do not impose specific performance standards on organizations. The international scope of ISO 14001, coupled with differing national laws and enforcement policies, makes it impossible to establish acceptable parameters for air emissions, water discharges and other similar environmental impacts.
The longest river in the United States is the Missouri River. The Missouri River starts in Montana and covers 2,540 miles before flowing into the Mississippi River, the second longest river in the United States. The Missouri-Mississippi river system is the third longest river in the world. The longest undammed river in the contiguous USA is the Yellowstone River at 692 miles in length. The 10 longest rivers in the United Sates are: Missouri: 2,540 miles. Mississippi: 2,340 miles. Yukon: 1,980 miles.
For other uses, see Missouri (disambiguation). The Missouri River is the longest river in North America. Rising in the Rocky Mountains of western Montana, the Missouri flows east and south for 2,341 miles (3,767 km) before entering the Mississippi River north of St. Louis, Missouri.