燃やす
blaze
blue
borehole
butane
chemical
collection
company
concept
creative
decorative
design
eco
ecologic
ecology
elements
emblem
energy
environment
extraction
fire
flame
flat
fuel
future
gas
global
glossy
icons
illustration
industry
innovation
isolated
manufacture
minerals
natural
nature
object
plant
power
renewable
resource
set
storage
supply
symbol
technical
technology
torch