Consider the following statements:

Statement I: Circular economy reduces the emissions of greenhouse gases.

Statement II: Circular economy reduces the use of raw materials as inputs.

Statement III: Circular economy reduces wastage in the production process.

Which one of the following is correct in respect of the above statements?

The correct option is: Both Statement II and Statement III are correct and both of them explain Statement I.

Understanding the Circular Economy:
A circular economy is an economic model designed to minimize waste and maximize resources. Unlike the traditional linear economy, which follows a "take-make-dispose" pattern, a circular economy focuses on sharing, leasing, reusing, repairing, refurbishing, and recycling existing materials and products for as long as possible.

Analysis of Statement II:
In a circular economy, materials are continuously looped back into the production cycle. By reusing and recycling existing products, the demand for extracting and processing virgin raw materials is significantly minimized. Therefore, Statement II is correct.

Analysis of Statement III:
One of the primary pillars of circular design is to eliminate waste and pollution at the source. This involves designing products for durability, disassembly, and refabrication, which ensures that by-products and end-of-life materials are kept out of landfills. Consequently, wastage throughout the production and manufacturing phases is minimized. Therefore, Statement III is correct.

Why Statement II and Statement III both explain Statement I:
Statement I states that a circular economy reduces the emissions of greenhouse gases. The reasons for this reduction are directly linked to the mechanisms described in Statements II and III:
1. Reduction in raw material input (Statement II): The extraction, refining, and transport of raw materials are highly energy-intensive processes that rely heavily on fossil fuels. By lowering the demand for new inputs, we directly lower the carbon emissions associated with upstream industrial activities.
2. Reduction in wastage (Statement III): Preventing waste means fewer materials end up in landfills or incinerators. Biodegradable waste in landfills undergoes anaerobic decomposition, releasing methane (a potent greenhouse gas), while incineration releases carbon dioxide. Minimizing waste directly mitigates these emissions.

Thus, because reducing raw material extraction and minimizing waste are the two primary drivers that lower greenhouse gas emissions, both Statement II and Statement III are correct and serve as explanations for Statement I.