As garbage trucks roll through Brooklyn this week, sanitation workers will be on the look out for organic waste as part of a widening city policy to require all residents in the borough to save their food scraps for the compost bin.

“We’ve been composting for years at the farmers market and other locations. We’re glad to see it spreading to other locations. Once it becomes mandatory, it will be less trash in the landfills,” said Wendy Reitmeier, a Brooklyn resident.

The Zero Waste Act, a legislative package of zero waste legislation, was enacted by City Council earlier this year to bring curbside composting to all five boroughs, going a step futher than a voluntary program instituted by the mayor that started in Queens last year.

This one is mandatory, aimed at keeping organic material from rotting in landfills where they release methane gas, which warms the climate.

“Meat, dairy, vegetables. Whatever it is, if it’s food, you can put it in your compost bin,” said Jessica Tisch, the commissioner of the Department of Sanitation, who pointed out that food-soiled paper and organic yard waste can also be composted.

Residents and building managers have until Oct. 13 to request a free brown composting bin, as the department takes on the added responsibility.

“We hired a lot of addtional sanitation workers and we bought a lot of new trucks. Many of the trucks that Brooklynites will see are dual bin trucks,” Tisch said.

The department is also working to get the word out as the policy continuesto roll out to the rest of the city.

Officials say recycling days will also be the day residents put out their compost.

Officials also say they hope to make composting as easy as taking out the trash.