ASAP MULTIPLE CHOICE WILL MARK BRAINLIEST What environmental situation is least likely to have a negative effect upon one’s health?

second-hand smoke

air pollution

thick dust or pollen

fog

Definitely fog

Explanation:

Second hand smoke is teh same thing as cigarette smoke which you definitely know smoking is bad for you. Air pollution hurts everyone so you can't breathe and thick dust is the same as air pollution. Brainliest please!

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when in a crucial situation, after calling 911, the correct posture for delivering effective compression is the proper hand placement.

first, place two fingers at the sternum, then put the heel of your other hand next to the fingers and place hand on top of the other. lock your elbows by using your body’s weight and compress the victim’s chest with a depth of 2 inches.

moreover, do 15 compression and 2 breaths, this process must be done four times until there is a pulse or a arrive.