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.
Global and Local Winds, Page 1. Wind is the horizontal movement of air. All wind is caused by. the uneven heating of Earthâs surface, which sets convection. currents in motion. Convection currents on a large scale cause. global winds; convection currents on a small scale cause local winds.