Read the passage below carefully:
For centuries, the extraction of palm oil in the rainforest belts of southern Nigeria relied on labor-intensive, traditional processing techniques handed down through generations. Manual pressing, while culturally rooted, yielded low extraction rates and required extensive firewood, accelerating local deforestation. In the late twentieth century, the introduction of mechanized hydraulic presses promised a technological leap forward. However, these early industrial units often marginalized women, who had historically controlled small-scale processing and derived primary economic independence from palm kernel processing. Today, a new paradigm is emerging through community-led eco-certified cooperatives. By integrating energy-efficient solar pressers with traditional communal labor structures, these modern initiatives optimize oil yield while preserving female economic autonomy. Furthermore, adhering to strict sustainable land-use criteria allows local farmers to command premium prices on global certified markets, proving that technological modernism need not dismantle indigenous social equity or environmental equilibrium.
Based on the passage above, arrange the key arguments in the logical sequence of their thematic development from beginning to end.
- 1Historical manual extraction practices yielded poor oil output and caused localized deforestation through heavy timber consumption.
- 2Early industrial processing machinery increased mechanical output but unintentionally eroded women's economic authority.
- 3Contemporary cooperative models combine solar-powered technology with traditional social structures to regain gender equity and boost output.
- 4Access to eco-certified international markets confirms that sustainable processing preserves both local equity and ecological balance while remaining profitable.