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As of 2018, Which of the Following Is NOT One

question 111

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As of 2018, which of the following is NOT one of the top three most common social networking sites worldwide?


Definitions:

Pollution

The introduction of contaminants into the natural environment that cause adverse change to air, water, or soil.

Factory Smokestack

A large chimney through which industrial gases, smoke, and particles are expelled into the atmosphere, often associated with manufacturing plants.

Preventable Health Problems

Health issues that can be avoided through interventions such as vaccinations, healthy lifestyle choices, and public health measures.

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