Thanks Jeremy,

I am able to solve the problem regarding indentation by changing the 
code as posted. There is one little question i want to ask.

How do convert these two hashes:

[{xxxxxx},{yyyyyy}]

to be like this:

[{xxxxxx, yyyyyy}]

Is it possible at all?

Regarding the Environmental class. I still need that class because i 
want to open my yaml file to be used by many subclasses, not just 
EnergyManagement only. Thanks

Nizam

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