Explain fluctuations in atmospheric carbon dioxide concentration both within the course of a single year and over the last century
What will be an ideal response?
Answer: It is supplied to the atmosphere by plant and animal respiration, the decay of organic material, volcanic eruptions, and natural and anthropogenic (human-produced) combustion. Carbon dioxide is removed from the atmosphere by photosynthesis, the process by which green plants convert light energy to chemical energy. For many decades, the rate of carbon dioxide input to the atmosphere has exceeded the rate of removal, leading to a global increase in concentration. The increase has occurred mainly because of an increase in anthropogenic combustion and, to a lesser extent, deforestation of large tracts of woodland.
You might also like to view...
Shallow-water offshore wind farms could provide up to 20% of the electricity needs in most coastal
states. Indicate whether the statement is true or false.
Glacial erosion has the following ways:
a. Weathering b. Plucking or Bulldozing c. Abrasion d. Both b and c e. Both a and b
Reverse faults can either shorten or lengthen the Earth's crust.
Answer the following statement true (T) or false (F)
What process reestablishes climax communities after a major disruption to the environment?
a. progression b. carrying capacity c. desiccation d. succession
e. stress tolerance