CO2-emission-calculator

This CLI application returns the amount of CO2-emission that will be caused when traveling a given distance using a given transportation method.

Transportation methods in CO2e per passenger per km:

• Small cars:

  • small-diesel-car : 142g
  • small-petrol-car : 154g
  • small-plugin-hybrid-car : 73g
  • small-electric-car : 50g

• Medium cars:

  • medium-diesel-car : 171g
  • medium-petrol-car : 192g
  • medium-plugin-hybrid-car : 110g
  • medium-electric-car : 58g

• Large cars:

  • large-diesel-car : 209g
  • large-petrol-car : 282g
  • large-plugin-hybrid-car : 126g
  • large-electric-car : 73g

• bus : 27g train : 6g

Source: Defra Greenhouse Gas Conversion Factors 2019

Run application

The application can be called with a numeric distance , a unit-of-distance (kilometer km or meter m ) and a transportation- method.

There are two builds. Run with Node V14 or with Deno V1.6 .

You can run the application like in the following example commands:

./co2-calculator --transportation-method medium-diesel-car --distance 15 --unit-of-distance km

./co2-calculator --distance 1800.5 --transportation-method large-petrol-car

./co2-calculator --transportation-method train --distance 14500 --unit-of-distance m

./co2-calculator --transportation-method train --distance 14500 --unit-of-distance m --output kg

Node

Go directory & launch in Visual Studio Code.

cd co2-calculator-node && code

Setup & run

Before you can make use of the application, it is required a terminal to install the dependencies and to compile with the following commands:

zsh run-node

Testing

As part of the application are also unit tests that are using the jest Framework. You can run the tests and read test coverages with following command:

npm test

to see coverage

npm run coverage

Example commands:

you can run the application with node in the following examples:

npm start -- --transportation-method medium-diesel-car --distance 15 --unit-of-distance km

node output/index.js --transportation-method medium-diesel-car --distance 15 --unit-of-distance km

Deno

Go directory & launch it in Visual Studio Code.

cd co2-calculator-deno && code

Run

You can run this shell to demonstrate the commands in it, and there is no need to install dependencies.

zsh run-deno

Example commands:

deno run index.ts --transportation-method medium-diesel-car --distance 15 --unit-of-distance km

deno run index.ts --distance 1800.5 --transportation-method large-petrol-car

deno run index.ts --transportation-method train --distance 14500 --unit-of-distance m

deno run index.ts --transportation-method train --distance 14500 --unit-of-distance m --output kg

Testing

deno test