Technological advances in transportation have come about in response to the depletion of fossil fuels and other negative aspects of the internal combustion engine. there are many positives to these advancements, but there are also some negatives. which statement is a negative aspect of these advancements?
a) these advancements use renewable resources like corn.
b) these advancements do not contribute to the greenhouse effect.
c) these advancements use cleaner fuels thereby reducing pollution.
d) these advancements are very expensive and not available to everyone.

The correct option is D) These advancements are very expensive and not available to everyone.

Explanation:

Consider the statement A. It states that the new technological advances uses renewable sources of energy. This is a positive aspect as the energy can be renewed and replaced. The corn from which this energy is derived can be produced over and over again. Hence, this is a positive aspect, not a negative aspect.

Consider statement B. This statement tells us that the new technological advances will not result in warming the Earth's atmosphere by greenhouse effect. Hence, it is a positive aspect.

Consider statement C. It states that the new technological advances will lead to lesser pollution. Hence, it is a positive aspect.

Now, consider statement D. It is a drawback because technological advances are too expensive to be used by many people. Hence, it is a negative aspect.

explanation:

on disadvantage of hydroelectric power is the cost. another disadvantage of using hydroelectric power is finding a water source powerful enough to harvest hydroelectric power.

b.