org1-prod.rb

# located at chef_repo/environments/org1-prod.rb
require 'deep_merge'

name 'org1-prod'
description 'Production environment for org1'
org1_yml_path = File.expand_path('../common/org1.yml', __FILE__)
common = YAML.load_file(org1_yml_path)
default_attributes(
  common['default'].deep_merge!(
    # declare all you org1-prod specific things here.
    'x' => 1,
    'y' => 2
  )
)

org1.yml

# located at chef_repo/emvironments/common/org1.yml
--
default:
  org1:
    bar: baz
    strange: [1, 2, 3]