The European corn borer is a pest whose larvae cause damage to com
crops in the United States. Pesticides can be used to control the larvae. As
an ALTERNATIVE, scientists have developed a genetically engineered form
of corn called the Bt strain. It produces a toxin in its cells called Bt, which is
poisonous to the corn borer larvae. Farmers who plant fields of Bt corn are
required by law to plant fields of non-Bt com nearby as well. *

light dependent reactions:

light independent reactions:

hope this !

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.  

they had the law tat factories that produces smoke cannot be built near residential buildings.

building of proper sewage system was done to ensure that the waste is carried away from the humans so that they do not get diseases from it.

also they built water systems to provide water in those areas which are drought prone.