LINCOLN, Neb. (AP) — The heads of Nebraska’s three largest electric utilities say changes are coming to the state’s public power industry as solar and wind-generated energy becomes more prevalent.

The leaders of Nebraska Public Power District, Omaha Public Power District and the Lincoln Electric System discussed the changes at a conference earlier this week highlighting efforts to harvest sun and wind resources.

Among the factors leading utilities to make changes, the leaders said, are cheap natural gas, more efficient homes, electricity surpluses, stagnant demand and changing government regulations.

OPPD has already seen quite a bit of change this year, with the shuttering of its nuclear power plant in Fort Calhoun last month.