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.
Section 3 Air Movement and Wind Key Concept Global winds and local winds are produced by the uneven heating of Earthâs surface. What You Will Learn â¢ Uneven heating of Earthâs surface by the sun causes differences in air pressure that cause wind. â¢ Wind patterns can be global or local and are influenced by the rotation of Earth and by geography. Why It Matters