Something cooking.
Pine needles, and wet mud near a lake, or the ocean..
The faint odor of cow and chicken crap, all year long.
crayons cause children like to color and I was once a kid that did that.
Dirt roads.
Pine sol
Fried Bologna sandwiches.
Car fumes and trash in the streets (big crowded city).
Warm apple pie up until age 10 . . . Then no smell.