OK, gonna try this Quick Answers thing, because this is bugging me, and I can't readily find an answer here or in the manual.
What is a "bonus grassland" square? Was playing last night, and started noticing those little white (blue?) dots in some of the grassland squares. My first thought was that this is where future bonus resources might pop up, but that doesn't make sense. I've seen some reference to "bonus grassland" squares in some of the strat guides, but they don't really explain them... So, here's your chance. Thanks!