Can the synergistic effect of various drugs result in an unknown harmful effect?

How can a driver best determine the safest speed to drive?

When diving into water, it is important to look before diving to avoid that could damage your nervous system deep water underwater hazards living creatures water toys

When trimming plants and vines: a.burn all the poisonous plants b.touch poison oak and poison sumac with your bare hands c.wear gloves d.cut as quickly as possible