When a student goes to school, the school becomes in loco parentis and the student doesn’t have protection from school officials. Children, on campus, general do not have protection for free speech, protection from unreasonable searches or seizures, or really any of their rights.
The school, acting as parents, can restrict their speech, search their bags, and confiscate contraband.
The school can even waive most of the child’s rights even when dealing with law enforcement until parents arrive.
Having lived in California, so much of their rain water actually just runs down the sewers. It’s so hard for the water to absorb into their soil because it’s become just baked into almost a crust. Having green space will probably make it easier for water to penetrate into the soil and be retained in the soil.