Identifying Features. The saguaro cactus (Carnegiea gigantea) is one of the defining plants of the Sonoran Desert. These plants are large, tree-like columnar cacti that develop branches (or arms) as they age, although some never grow arms. These arms generally bend upward and can number over 25.Saguaros are covered with protective spines, white flowers in the late spring, and red fruit in summer.hese plants are large, tree-like columnar cacti that develop branches (or arms) as they age, although some never grow arms. These arms generally bend upward and can number over 25. Saguaros are covered with protective spines, white flowers in the late spring, and red fruit in summer.
Here's a guide to the life expectancy of big-ticket purchases, from the roof down to the refrigerator. Most kitchen appliances, such as refrigerators, dishwashers and gas range ovens, should be replaced every 10 to 15 years. By Geoff Williams.
An estimated 170 million refrigerators and refrigerator-freezers are currently in use in the United States. More than 60 million refrigerators are over 10 years old, costing consumers $4.7 billion a year in energy costs. By properly recycling your old refrigerator and replacing it with a new ENERGY STAR certified refrigerator, you can save between $35â$300 on energy costs over its lifetime.