Economics-supply and demand

Hello this is what supply and demand is here is a chart explaining what supply and demand is
Supply and demand is an economic model based on price utility and quantity in a market.

My Job on the Matai Island

I am quite interested in the economy and economics so on the island I would like to be something like the minister of trade or the minister of economic development I think it would be cool trading with the other islands like for example if someone wanted to be a blacksmith I would trade with an island to get the blacksmith some iron ore or an other metal.

What is an eco house?

Hello I was wondering what is an Eco house I googled it and I found this it is a brief overview of what an Eco house is.

Click the link to see it. http://www.ecobob.co.nz/EcoHelp/What-is-an-eco-house.aspx.

If I was to design an Eco house it would be framed with wood and the inside would probably be made out of wood the roof would be wood and bamboo nailed closely together the external walls would be mud bricks, I would soalar panels attached to the roof so I could have power.