英文關鍵字
activist
advertisement
advertising
aged
agriculture
care
caucasian
charity
conservation
earth
eco
ecological
ecology
ecosystem
enthusiast
environment
environmental
event
forest
gardening
green
growth
happy
male
man
natural
nature
park
participation
plant
planting
preservation
project
protection
reforestation
resources
responsibility
restoration
sapling
save
seedling
senior
smile
smiling
spring
tree
volunteer
volunteering
volunteerism
welfare