Question about ressources

[Loader2k]

When i mouse over one of the ressources in the city screen it
shows
+1 health
+ food
for health ressources, and analogous for the other types of
ressources (+ 1 shield for strategic ressources, +1 commerce
for luxury).

Now what does the +1 food mean? I dont seem to be getting
an additional food into my cities for a health ressource.

Thanks guys.

[Nacht]

It's what the resource adds to the tile if worked by a city.

So take for example a cow on plains. Plains usually give 1 food and 1 hammer. The cow says +1 food and indeed cows on plains gives you 2 food and 1 hammer.

The really important thing however is what such a tile produces with it's appropiate improvement. A pasture on that cow gives +1f/+2h thus making it a 3 food/3 hammer tile.