Well they had this idea to make fuel out of algae but they are working on it . :)
Local would be "how the fuel prices affect the food prices at your grocery store". Regional would be "how international conflicts affect the foreign policies of the United States of America. Global would be "how can we maintain and keep world peace among countries".
That would affect the food cycle, less production.
Plugged fuel and or air filters can affect performance.
Well if you were going some where the tide could affect your speed. The tide could affect the time it would take you to get there. The tide could affect the amount of fuel you would burn. The tide could affect the water depth. The tide could affect the clearance you have if you are going to go under a bridge. So check your tide chart. If you go with the tide you save time and fuel.
If a new, cheaper fuel was developed, it would greatly affect OPEC. OPEC would probably have to lower its prices in order to remain competitive.
A fuel level sensor will not affect performance. Fuel level can due to weight of fuel and accumulated heat in the returned fuel from the engine.
The demand for gasoline would go down.
If it shares a serpentine belt with the alternator it could affect the water pump. It would also affect the power steering system, the A/C system. So, your answer would be YES!
The difference in the viscosity of gasoline a, gasoline b and gasoline c is so small that I would not expect it to affect a fuel pump at all.
We would use another fuel.
The fire would have less burning fuel and may not be active for long
Because then it would damage the circle of life!