SAN JUAN, Puerto Rico — A New Jersey-based shipping company says it will finance the $350 million construction of two containerships for Puerto Rico trade that will be better for the environment.

TOTE Inc. said Tuesday the ships will operate on liquefied natural gas, generate 71 percent less carbon dioxide than other ships and nearly eliminate particulate matter and sulfur oxides.

The company said the ships will sail between Jacksonville, Fla., and San Juan, with one beginning in 2015 and the other in 2016.

They will be built by General Dynamics NASSCO in San Diego and be able to carry five times the number of 53-foot containers that current ships carry in Puerto Rico.