Category: Now I Can Breathe

100. Trees block these life-giving rays to cool the air beneath their branches. (What is sunlight?)

200. One large tree provides four people with a day's worth of this essential gas, critical for life on planet Earth. (What is oxygen?)

300. Trees absorb this harmful gas along with other potentially harmful gasses including sulfur dioxide and carbon monoxide. (What is carbon dioxide?)

400. Trees trap and hold these airborne allergens that are harmful to us. (What are dust, smoke, and—ironically--pollen? Note: Accept any of these answers.)

500. Trees cool the air, land, and water with shade and moisture, reducing this effect in urban areas. (What is the heat-island effect? Note: An urban heat island is a metropolitan area that is significantly warmer than its surrounding rural areas due to human activities.)

Category: Home Sweet Home

100. Trees can help lower these bills for a homeowner by providing shade in the summer. (What is electricity; what are utility or power bills?)

200. Trees provide a home for these nesting animals that bring joy and song to the local community. (What are birds?)

300. Trees provide a home for these nesting animals that bring joy to some and pain to many gardeners and homeowners. (What are squirrels? Note: The group may name insects such as caterpillars; accept any reasonable answer.)

400. Deciduous trees (the trees that lose their leaves in the fall or winter) block sunlight in the summer, but allow sunlight to reach and warm your home in the winter if you place them near this side of the house. (What is south; what is west? Note: Accept either or both.)

500. When placed strategically around your home, these trees that keep their leaves in the winter can be used to reduce wind exposure and loss of heat from your house by as much as 50 percent. (What are evergreens?)

Category: Happy, Healthy, Wealthy, and Wise

100. When trees absorb falling rain, they can reduce the severity of this natural disaster. (What is flooding?)

200. A room with a view of trees has been documented to speed the recovery for people staying in this type of institution. (What is a hospital?)

300. Trees provide these edible items that taste delicious and are often beautiful and sweet smelling, too. (What are nuts, seeds, and fruit? Note: Accept any reasonable answer.)

400. Trees can help screen an ugly view or define space within an area, providing this special element to a yard or landscape. (What is privacy, solitude, or security? Note: Also acceptable are peace, serenity, relaxation, or anything else that you deem reasonable.)

500. Trees can lower blood pressure, slow heartbeat, and help people feel this pleasant sensation. (What is relaxation?)

Bonus Answer for "Final Jeopardy"

Streets with trees increase walking and jogging, thus increasing interaction among these people who live near each other in a community. (What are neighbors?)