Renamed column pollution to environment.
Renamed coffee to js.
Added method for number changed
Added underscore gem.
Deleted all content from cities.js.
Changed the from using just html.
Summing up the inputs.
Initializing @city in the controller.
Alerting when sum is above 100.
Setting the changed input value to zero.
Added all the relevant fields.
Changed method to get.
Added debugger.
20 is the default value of each city grade.
Added a method city_grade that calculates grade

for each city.
Rendering the result view.
Added result action for choice.
Using cities_grades on the result action.
Displaying the table with city name and values.
Added link to each city.