Save the Earth…Clean our Air!
The air quality control committee for Sandpoint (the city you see below) has $2100 to spend on
planting spruce and maple trees. The land available for planting trees is outlined in black on the
map below. How many of each tree should the air quality committee plant?
Planting Cost
Area Required
Carbon Dioxide Absorption
Spruce
$30
600 square feet
550 lb/yr
Maple
$40
900 square feet
800 lb/yr
Scale: 1 grid square = 10ft x 10ft