Final answer:
Concerns about worldwide pollution are classified as a 'Threat' in the SWOT framework.
Step-by-step explanation:
The SWOT (Strengths, Weaknesses, Opportunities, Threats) framework is a tool used to analyze a company's internal and external factors.
In this case, the statement 'Concerns about worldwide pollution are an issue to petroleum-based products' would fall under the category of Threats in the SWOT framework. It represents an external factor that poses a potential risk to the petroleum-based products industry.