abstract

alpha

alternative

arrow

business

channel

chart

classification

color

conservation

cycle

cyclic

data

development

diagram

direction

eco

ecologicalquot

ecology

efficiency

energy

environment

environmental

flow

friendly

graph

green

information

isolated

key

level

loop

mask

motion

multicolor

object

pie

power

rainbow

rating

recyclable

recycle

recycling

report

rotation

saving

solution

spin

white