1. nature environment
1.1. water
1.1.1. don't waste water
1.1.2. no pollution
1.1.3. drink fresh water
1.2. air
1.2.1. use less gas
1.2.2. exhaust emission control
1.3. sun uv/sv
1.3.1. don't look at the sun directly
1.3.2. wear a hat
1.3.3. wear sunglasses
1.3.4. put on sunscreen
2. peaceful world
2.1. family relationships
2.2. no bully
2.3. no wor
3. TRANSPORTATION
3.1. walk to school
3.2. put safety belt
3.3. watch for traffic signals
3.4. don't squeeze on bus
4. life
4.1. do:
4.1.1. food
4.1.1.1. do:
4.1.1.1.1. eat healthy food,
4.1.1.1.2. eat more vegetables than meat
4.1.1.2. do not:
4.1.1.2.1. eat junk food
4.1.1.2.2. less sugar
4.1.2. sleep
4.1.2.1. sleep early
4.1.2.2. get up early
4.1.3. study or work
4.1.3.1. work/study hard
4.1.4. exercise
4.1.4.1. sports
4.1.4.2. dancing
4.1.5. entertainment
4.2. do not:
4.2.1. be lazy
4.2.2. be potato couch
5. safety
5.1. TRANSPORTATION
5.1.1. walk to school
5.1.2. put safety belt
5.1.3. watch for traffic signals
5.1.4. don't squeeze on bus
5.2. nature environment
5.2.1. water
5.2.1.1. don't waste water
5.2.1.2. no pollution
5.2.1.3. drink fresh water
5.2.2. air
5.2.2.1. use less gas
5.2.2.2. exhaust emission control
5.2.3. sun uv/sv
5.2.3.1. don't look at the sun directly
5.2.3.2. wear a hat
5.2.3.3. wear sunglasses
5.2.3.4. put on sunscreen
5.3. life
5.3.1. do:
5.3.1.1. food
5.3.1.1.1. do:
5.3.1.1.2. do not:
5.3.1.2. sleep
5.3.1.2.1. sleep early
5.3.1.2.2. get up early
5.3.1.3. study or work
5.3.1.3.1. work/study hard
5.3.1.4. exercise
5.3.1.4.1. sports
5.3.1.4.2. dancing
5.3.1.5. entertainment
5.3.2. do not:
5.3.2.1. be lazy
5.3.2.2. be potato couch
5.4. peaceful world
5.4.1. family relationships
5.4.2. no bully
5.4.3. no wor