bangkok

choa

clean

common

contaminated

contamination

corrosion

crassipes

damage

danger

dangerous

destroy

destruction

dirty

disaster

disposal

ecology

eichhornia

environment

environmental

floating

foam

garbage

global

hyacinth

junk

many

natural

nature

oil

plant

plastic

poison

pollute

polluted

pollution

poor

poverty

praya

problem

recycle

recycling

reduce

river

rubbish

sewage

substance

surface

thailand

trash

treatment

tree

warming

waste

water