Question

what is a method by which vocs are emitted into the atmosphere?
spray painting
playing soccer
biking to work
walking around your neighborhood

Explanation:

Volatile Organic Compounds (VOCs) are emitted from sources like paints, solvents, etc. Spray - painting uses paints which contain VOCs. When spray - painting, these VOCs evaporate and are released into the atmosphere. Playing soccer, biking to work, and walking around the neighborhood do not involve the release of significant amounts of VOCs.

Answer:

spray painting