More than 900 government buildings in the Chicago will shift their electricity use to the “100 percent renewable energy” by the year 2025 under an ambitious mayoral plan which contrasts sharply with the President Donald Trump’s retreat on the environmental issues.

Together, the Chicago Public Schools, City Colleges, Chicago Park District fieldhouses and also the buildings owned by city and the Chicago Housing Authority consume 8 percent of all the electricity used in the Chicago, according to the city officials.

In the last year, that amounted to nearly 1.8 billion kilowatt hours, which is enough to power for 295,000 Chicago homes. It would take more than 300 wind turbines to generate the same amount of power.

Now, Mayor Rahm Emanuel is promising that to make the switch to all renewable energy, though he has not said how much he is prepared to spend to make that happen.

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The 900 government buildings will accomplish that shift through a variety of strategies.

City Colleges have installed the solar panels on the roofs of Richard J. Daley College and also the Dawson Technical Institute. Those installations have generated more than $16,000 in the energy savings, said the officials.

Chris Wheat, the City Hall’s chief sustainability officer, has not said how many of the 900 buildings will have space for the “on-site generation” nor has provided specifics on the costs.

Wheat acknowledged that there will be short-and long-term costs and Emanuel said that, he is “not making any commitments on capital outlay at this time.”

Jack Darin, the president of Illinois Sierra Club, said that the mayor’s plan would be a “big win for Chicago residents, their health and their environment.”

Mrudula Duddempudi.