The Los Angeles and Long Beach harbor commissions on Monday finally agreed to update an environmental plan that will concentrate on reducing harmful emissions spewed from cargo vessels, cruise ships and locomotives over the next decade.

The revised Clean Air Action Plan is expected to reduce the risk of cancer from port-related pollution by 85 percent over the next decade.

Both civilian panels, which oversee the bustling ports of Los Angeles and Long Beach, delayed a decision last month on whether to adopt the plan because several aspects were questioned by local shippers, railroad companies, environmentalists and other stakeholders.