EmberJS expose env variable as route

I would like to configure a URL differently in my ember app depending if the app is running in production or development mode. Is this possible to do by loading the endpoints into config/environment.js and accessing the value of the ENV object in a handlebars template? Maybe I have to expose the ENV value in a controller? Or is there some other mechanism for doing this?

Something like this:

// config/environment.js

if (environment === 'development') {
  ENV.zzz.url = "http://www.reddit.com";
}

if (environment === 'production') {
  ENV.zzz.url = "http://www.google.com";
}

// app/controllers/application.js

export default Ember.Controller.extend({
  siteUrl: ENV.zzz.url
  ...

// somefile.hbs

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