# Carbon Dioxide Output Percentage Change

## Homework Statement

Question: If petroleum used in transportation were replaced by electricity generated by coal, what would be the percentage change in carbon dioxide output?

Refer to the following diagrams for values:

Given Information:
• Petroleum has an efficiency rating of 1/4 in transportation.
• Coal that is burned to produce electricity has 1/3 efficiency.
• Petroleum has 2/3 the carbon footprint of coal.
• Switching to coal means: using less of a fuel; fuel has higher carbon footprint.

## Homework Equations

$Percentage \ change = \frac{Initial - Final}{|Initial|}$

## The Attempt at a Solution

$Percentage \ change = \frac{1170 - 1180}{|1170|} \\$
$Percentage \ change = -0.56\%$