Labor certification is  a United States of America immigration process step. Its stated goal is to protect U.S. workers and the U.S. labor market by ensuring that foreign workers seeking immigrant visa classifications are not displacing equally qualified U.S. workers..
How are local winds and global winds differ? local winds-are winds that blow over short distances caused by unequal heating of the earths surface in a small area. global winds-are winds that blow around the earth from â¦ the north pole to the south pole.
What is the movement of air called? Global winds are composed of three different wind patterns: trade winds, polar easterlies and westerlies. The trade winds are located from 30 degrees latitude, north and south, to the equator. When cooling air sinks, the air flows steadily back down the equator.