natural gas icon set

barrel battery benzine black blaze blue borehole burn butane car chemical collection concept creative derrick design eco ecologic ecology electric electricity element energy environment extraction fire flame fossil fuel future gas gasoline global glossy green icon idea illustration industrial industry innovation isolated label manufacture minerals natural nature nuclear oil petrol petroleum pictogram plant pollution power pump quality renewable resource set shadow sign silhouette silhouettes solar station storage sun supply symbol tank tanker technical technology torch truck vector water wind