Could you help me 500words an essay of 'my green world'?

Write sentences the way you speak - just pretend you are telling this to a friend, and write down what you would say. What would you tell them about this topic? Look up some facts! How would you explain this topic to your friend? What does a green world mean to you? What can you do to MAKE "your green world"?

If you just start writing, you will be through with your assignment before you know it!