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.
Weather - Wind. 1  Trade winds - Trade winds occur near the equator and flow from either the north or south towards the equator. They curve towards the west due to the spin of the Earth. 2  Prevailing westerlies - In the middle latitudes of the Earth, between 35 and 65 degrees latitude, are the prevailing westerly winds.