Great Works Information
Okay guys, since we are working on the International Airport Great Work, I felt it'd be helpful to post how to send materials to the Great Work. We need all the materials we can get so it'll finish faster!
Now you may be asking, what's the use for an International Airport? Actually, it gives several big advantages to your cities. First of all, tourists will have an easier time getting to your city, and you will receive more tourists than ever! Second, materials can be transferred to and from the Global Market to your city faster and easier. As you can see, it's a huge advantage for everyone in the loop that has connection to the Airport. Although it is not an advantage to the whole region, it's one step closer to a fantastic region.
Now, to send materials to the Great Work, you're going to need to mine it up (Metal and Ore) or drill it up (Crude Oil), so place something down. Then plop down a Trade Depot. Set the material you're sending to the global market as "Use Locally" then click on the Great Work. You should see something like this:

Click on the power button to sign up for delivering the material to the great work. As you can see, I am delivering Crude Oil to the great work. Here's a production line to help explain where your materials go. (I'm using Oil as an example, it's the same for every material)
Oil Well -->
Trade Depot -->
Great WorkOil is drilled up. Oil is delivered to depot. Oil is sent to the great work.