1. population
1.1. population control
1.1.1. birth control
1.1.1.1. limit to 2 children per couple
1.1.2. sexual education
1.1.3. make contraception widely available
2. water
2.1. water not available in all parts of the world
2.1.1. desalinisation
2.1.2. human right to have access to clean water
2.2. clean water not available
2.2.1. distribute filters and water disinfectants
2.2.2. develop easy ways to disinfect water
2.2.3. create potable water fountains
3. reduce poverty
3.1. homelessness
3.1.1. shelters
3.2. starvation
3.2.1. food banks
3.3. below poverty line
3.3.1. fund raising
3.3.2. charity
4. clients
4.1. eco warriors
4.2. young educated people
4.3. teachers
4.4. students
4.5. less privileged people
4.6. charities
4.7. large corporate business who want to give back to the community
5. health care
5.1. too expensive
5.1.1. services
5.1.1.1. make public health care available to all
5.1.2. medication
5.1.2.1. reduce pricing of medication
5.2. not available everywhere
5.2.1. make health care accessible in all areas
6. education
6.1. too expensive
6.1.1. make good public education available to all
6.2. not available everywhere
6.2.1. make public education accessible everywhere
7. Animal rights
7.1. no poaching
7.2. no hunting
7.3. no abuse
7.4. don't destroy their habitat
7.4.1. preserve natural reserves
7.5. don't pollute their habitat
7.5.1. reduce deforestation
7.5.1.1. plant more trees
7.5.1.2. stop cutting down trees
8. Materials
8.1. find new sustainable materials
8.2. don't use materials that release toxic gases during production
8.3. don't use materials that release toxic gases during decomposition
8.4. don't use non-biodegradable material
9. environment
9.1. climate change
9.1.1. global warming
9.1.1.1. To reduce global warming
9.1.1.1.1. reduce carbon emissions
9.1.1.1.2. reduce deforestation
9.2. pollution
9.2.1. soil pollution
9.2.1.1. sustainable agriculture
9.2.1.2. less waste in landfills
9.2.1.2.1. recycling
9.2.1.2.2. reuse
9.2.1.2.3. reduce
9.2.2. water pollution
9.2.2.1. reduce one-time plastic use
9.2.2.1.1. use multiple use material
9.2.2.2. don't dump waste in water
9.2.2.2.1. treat sewage and use it for agriculture
9.2.2.3. reduce oil spills
9.2.3. air pollution
9.2.3.1. reduce toxic gas emissions from factories
9.2.3.2. don't use diesel cars
9.2.3.3. plant trees
9.2.4. noise pollution
9.2.4.1. limit the time that big machinery can be active on the streets
9.2.4.2. mandatory wear of ear protection in factories
9.2.5. light pollution
9.2.5.1. switch off street lights during specified times
10. Energy resources
10.1. don't use
10.1.1. coal
10.1.2. oil
10.1.3. gas
10.2. use
10.2.1. wind
10.2.2. solar
10.2.3. tidal
10.2.4. hydroelectric
10.2.5. wave
10.2.6. biofuel
11. Equality
11.1. gender
11.1.1. equal rights to education
11.1.2. equal pay
11.1.3. equal opportunity at work
11.1.4. right to drive a car
11.2. race
11.2.1. equal rights to education
11.2.2. equal pay
11.2.3. equal access to health care
11.2.4. fair trial
11.2.5. equal opportunity at work
11.3. religious beliefs
11.3.1. respect religious beliefs
11.3.2. don't commit mass genocide
11.4. social class
11.4.1. equal access to health care
11.4.2. equal access to eduction
11.4.3. equal access to food and water