Which of the following strategies can earth's coal supply last longer? a. replant diminishing forests. b. install scrubbers in power plants. c. build and use solar power plants. d. capture and store carbon.

C. Build and use solar power plants.

Coal is a non renewable source of energy, once consumed cannot be recovered. Therefore the quantity of coal is reduced with its continuous usage throughout in the world. On the other hand solar energy is a renewable source of energy and it has to do nothing with the quantity of consumption. So we can say that replacing non renewable sources of energy such as coal with renewable sources of energy that is solar energy can make the coal supply last longer.

C- build and use wind power plants

hypoxemia refers to a below usual concentration of oxygen in the blood, mainly in the arteries. hypoxemia is an indication of an issue associated with circulation or breathing and may lead to various symptoms like shortness of breath.  

the condition is identified by determining the level of oxygen in the blood sample obtained from an artery. it can also be predicted by determining the oxygen saturation of the blood with the application of a pulse oximeter.  

the normal arterial oxygen is about 75 to 100 mm hg. the values underneath 60 mm hg is generally considered with the requirement for supplemental oxygen. the normal pulse oximeter readings generally range between 95 to 100 percent. the values under 90 percent are regarded as low.  

in the given case, the oxygen saturation is measured at 93 percent, hence, there is no need to administer oxygen, that is, one should withhold oxygen.