They have a somewhat stronger flavour, and are served with a Mexican flavour sauce instead of tomato sauce. This question is an enquiry as to which type of coffee you would prefer. The idea is that caffeine in coffee causes you to feel tense and stressed, I believe. Some people also believe that caffeine can be a cause of cancer and birth defects, although this theory doesn't appear to have any scientific basis. Just almost every source of coffee in the USA and Canada will offer you the choice between regular and decaffeinated.
Caffeine is also present in tea and cola.
Res Reservoir - an artificial lake retained by a dam. Reserve - a nature or wildlife reserve. Ride Sharing See Car Pool Roast Beef Sandwich Numerous very thin slices of roast beef, in a bun. One of the best known brands of root beer is A and W, which is also the name of an associated fast food chain. RTD Rapid Transit Department, i.e. the public transport authority.