The city’s curbside composting program has expanded to Brooklyn.

Composting is known as the natural process of recycling organic matter, like leaves and food scraps into a valuable fertilizer.

The Zero Waste Act was enacted by the City Council earlier this year to help bring curbside composting to every borough. It goes a step further than the mayor’s voluntary program that began last year, but only in Queens.

As of this week, the program is available in Brooklyn.

Residents and building managers throughout the borough have until next Friday, Oct. 13, to order a brown composting bin for free.

Councilmember Sandy Nurse, the chair of the committee on Sanitation and Solid Waste Management, joined NY1 political anchor Errol Louis on “Inside City Hall” Friday to discuss more.

Her district in Brooklyn includes much of Bushwick and Parts of Cypress Hills, East New York and Brownsville.