When were chlorofluorocarbons (CFCs) phased out of production?

• A. December 31, 1990
• B. December 31, 1995
• C. December 31, 2000
• D. December 31, 2005

Answer: (B)

Chlorofluorocarbons (CFCs) were phased out of production primarily due to their role in ozone layer depletion. The Montreal Protocol, an international treaty designed to protect the ozone layer by phasing out substances that deplete it, was adopted in 1987. The agreement included specific timelines for phasing out CFC production and consumption in participating countries.

The most significant deadlines set by the Montreal Protocol for the developed countries were aimed at phasing out CFCs by December 31, 1995. This substantial reduction was crucial as it marked a concerted global effort to mitigate the negative environmental effects attributed to CFCs.

Understanding this timeline helps clarify the importance of the international agreements and the urgency of addressing environmental issues related to ozone depletion. The other dates do not align with the established deadlines set forth by this pivotal treaty in the context of CFCs, solidifying December 31, 1995, as the correct answer for when the substances were widely phased out of production.