H.J. Heinz Co. has cut its solid waste generation by nearly 50 percent in the past six years, the company said in its sustainability report.

The Pittsburgh-based food retailer said since 2005 it has reduced globally its solid waste per 100 metric tons of production by 45.6 percent.

In 2011 Heinz formed a partnership with Coca-Cola Co. allowing Heinz to produce fully recyclable ketchup bottles using Coke’s PlantBottle technology. With PlantBottle packaging as much as 30 percent of the material comes from a renewable source, plants.

Solid waste projects under way for Heinz include a reduction in packaging, the company said in a news release.

"Heinz is on track to achieve or surpass our goal of reducing greenhouse gas emissions, solid landfill waste, energy consumption and water consumption by at least 20 percent each by fiscal year 2015,” said William R. Johnson, Heinz chairman, president and chief executive officer.