Their root system usually extends far out from the shrub to absorb whatever rain falls in the area. Some plants do have roots that extend far into the soil, over 30 feet, to reach underground water. Their leaves are drought resistant and may have thorns or spines to protect themselves from other organisms. Describe the carbon cycle. The carbon, in the form of carbon dioxide, evaporates into the atmosphere.
Rain is slightly acidic.
Carbon dioxide can be used by healthy plants. The plants consume the carbon dioxide and release oxygen. With all the cutting of forests, there is becoming a decreasing amount of plants to produce oxygen.