500 word articles about commodities

I need 500-600 word articles about commodities. The article should be catered to an educated adult crowd. The articles should be for all readers but should have interesting points for people that trade the commodity if possible. When quoting state how many articles for what price and how long. Article topics I need: Coffee types- specifically jamaican blue mountain coffee and kona coffee, i want an article about the different kinds of coffee including these more exotic kinds.. and possibly the general difference between coffees from around the world.. columbia, brazil, mexico, italy, whatever.. needs interesting facts Oil companies- article about the biggest oil and gas companies in the world.. their history.. who's the biggest.. any relevant interesting news going on in the industry etc Oil sands- articles about all the oil in oil sands.. talk about canada and interesting facts abotu the costs of this procedure, what countries have it, is it a possibiltity etc Copper mining- articles about modern day mining copper.. the opportunities available in it.. is it a big business.. companies that do it.. how much copper is mined... what countries Gold mining.. same information as copper mining The practical uses of silver-- where silver is used.. how its used.. any interesting facts about the metal.. open to other topics if suggested...