Alcohol has negative externalities because it has the capacity to cause health problems
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1. Petrol (or gas as called in the US) is used to fuel cars, it has many benefits on a small scale from transporting people, to large scale transportation of goods and products and promoting trade. The primary effect of petrol use is energy, that is used to move vehicles, etc. However, when petrol is used, there are various externalities (which are effects that were not the primary intention of use of the product) , one of which is carbon dioxide. This is an unintended effect of petrol use (externalities) and carbon dioxide has negative effects, therefore it is a negative externality.
negative x positive = negative negative x negative = positive negative x negative x negative = negative negative x negative x negative x negative = positive .....
Positive + Negative = Negative Negative + Negative = Positive Positive + Positive = Positive Negative + Positive = Negative
yes because a negative X a negative is a positive, thus a positive/a negative=a negative
No, a negative multiplied by a negative is a positive, as is of course a positive multiplied by a positive. Only when a negative is multiplied by a positive is the answer negative.