Why in news
Ministry of Power data tabled in Parliament showed India's hydro reservoir energy content down 43% nationally, with the Southern region collapsing 63% year-on-year, prompting increased reliance on coal-fired generation to cover the shortfall.
Why for UPSC
UPSC increasingly tests whether aspirants remember not just an aggregate national figure but the actual regional disaggregation and ranking beneath it - exactly what a "NOT correct" question with a plausible-sounding but reversed regional comparison probes.
Prelims summary
India's hydro reservoir energy content fell 43% nationally (April-July 2026), with Southern India recording the steepest regional decline at 63%, followed by Eastern (-28%), Northern (-25%), North-Eastern (-22%) and Western (-13%) - the mildest decline of any region.