Bank of America. Theyâre among the 5 largest credit card companies on this list. 1  Rewards are a mixed bag. 2  Some of their cards use WorldPoints and as you can read about here, theyâre redemption value can be low.
All of that is being dumped into the Gulf of Mexico! The dead zone in the Gulf of Mexico has grown bigger over the years and is a dramatic case of what can happen. Unfortunately, according to many scientists, dead zones are becoming more common in the coastal waters of the United States.
What is the âDead Zoneâ? In coastal marine environments, âDead Zonesâ are regions where oxygen concentrations are very low. This condition of oxygen deficiency, known as hypoxia, is caused by an interaction between biological, chemical and physical factors. In the absence of sufficient oxygen, animals and plants either die or leave the dead zone. Although these affected waters are called dead zones, many bacteria can thrive in this region, feeding on the abundant food produced in the overlying waters. Hypoxia is a natural phenomenon that occurs periodically in coastal waters around the world.