environmental
art
auto
automobile
black
button
can
canister
color
conservation
design
diesel
drop
element
engine
flat
fossil
fuel
gallon
gas
gasoline
icon
illustration
industry
interface
isolated
kerosene
line
liquid
motor
object
oil
outline
painting
petrol
petroleum
plastic
reservoir
sign
simplicity
single
symbol
thin
transport
transportation
vehicle
water
web
white