Today these hydro systems contribute roughly 40 % of the electricity produced in Russia 's Second Electricity Zone ( Siberia ) .
Today these hydro systems helps to explain why the wholesale electricity prices in Zone 2 are structurally cheaper than in Zone 1 ( European Russia ) .
Today these hydro systems contribute roughly 40 % of the electricity produced in Russia 's Second Electricity Zone ( Siberia ) and helps to explain why the wholesale electricity prices in Zone 2 are structurally cheaper than in Zone 1 ( European Russia ) .