anchor.diff:                  CUSTOM_VAR_A = custom_value
                   CUSTOM_VAR_B = custom_value_2
   
  -            **- Delete an Environment variable**
  +            **Delete an Environment variable**
   
                   modulus env delete CUSTOM_VAR_C            
   
               Learn more about [Environment variables](http://help.modulus.io/customer/en_us/portal/articles/1701180-using-environments-variables).
   
               ## Your MongoDB Database
  -                      
  -            We'll create a ENV variable for `MONGO_URI`. You can use this with your MongoDB client.
  +                        
  +            You can add a MongoDB to your project with a simple command:
  +            
  +                $ modulus addons add mongo:base
  +            
  +            This will create an ENV variable called `MONGO_URL`. You can use this with any node.js MongoDB client.
   
                   var MongoClient = require('mongodb').MongoClient;
   
  
positive.code: 
              ## Configure Environment variables
  
              **- Create an Environment variable**
  
                  $ modulus env set CUSTOM_VAR_C custom_value_3
                  Setting CUSTOM_VAR_C for project ExampleProject
  
negative.code:                 
              Your project environment variable will be accessible via `process.env.CUSTOM_VAR_C`.
                  
              **List Current Variables**
  
                  $ modulus env list
                  Project ExampleProject Environment Variables
  