High Voltage Sign
Golf
Bread
Food Safety
Risk On Dartboard Showing Dangerous
Exclamation Mark On Phone Displays Attention Warning
Safety Lock Represents Protect Caution And Care
Road work flashers
Pylon
Environmental river damage
Chemistry
Bacteria
pH
Microbiology
Escherichia coli
Mortar and pestle
Poison
Bacteria growing on a Perti dish
Chemical solution
