Read the passage below carefully:
Kenya’s Rift Valley has emerged as a global focal point for geothermal energy development, leveraging subterranean heat to generate clean, renewable electricity. Situated within the Olkaria field, geothermal power plants now supply over forty percent of the nation's grid electricity, drastically reducing reliance on climate-vulnerable hydroelectricity and costly imported diesel. Proponents emphasize that this transition has stabilized energy tariffs for industrial manufacturing and significantly lowered national carbon emissions. However, environmental sociologists note that subterranean extraction requires careful monitoring, as localized land subsidence and steam vents have occasionally displaced indigenous pastoralist communities. Additionally, while the initial infrastructure requires high capital investment, long-term operational costs remain remarkably low compared to fossil fuels. Consequently, energy planners argue that integrating community compensation schemes with technical expansion is essential to maintaining sustainable geothermal development.
Based on the passage above, match each excerpt on the left with its correct functional role within the paragraph on the right.
- Sustainable geothermal development in Kenya requires balancing technical expansion with social safeguards for affected communities.Primary Main Idea / Central Thesis
- Geothermal power plants currently supply over forty percent of the nation's grid electricity.Supporting detail providing empirical statistical evidence
- Localized land subsidence and steam vents have occasionally displaced indigenous pastoralist communities.Supporting detail introducing a socio-environmental challenge
- Initial infrastructure demands high capital investment, but long-term operational costs remain remarkably low.Supporting detail explaining financial and economic structures