Ticket reservations are required. Facial coverings are strongly recommended. See Health and Safety.
Part of the Climate Change exhibition.
They shade buildings and absorb CO2 and other greenhouse gases from the air.
Leaf and snow blowers use gas or electricity, but raking and shoveling emit no greenhouse gases.
create a "lawn" that doesn't need mowing.
Each gallon of gas burned emits 9 kilograms (20 pounds) of CO2; each gallon of diesel emits 10 kilograms (22 pounds).