Iodine supplements usually aren't necessary if you live in the United States or in most developed countries. Some alternative medicine practitioners recommend iodine tablets or kelp supplements â which are high in iodine â for people with hypothyroidism.
The area within the entire watershed of the Rio Grande is some 336,000 square miles (870,000 square km). Because a large proportion of the riverâs basin is arid or semiarid, however, only about half of the total area, or about 176,000 square miles (456,000 square km), actually contributes to the riverâs flow.
The Rio Grande River forms part of the natural border between the United States and Mexico. This river forms the border between the United States and Mexico, but only on the border with Texas. The rest of the United States-Mexican border is a land border stretching from New Mexico to California. There was a dispute over which river originally formed the border between the United States and Mexico in Texas. The Mexicans said it was Nueces River, which would have made Texas smaller than it currently is.