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As per this article:

Cargo shipping is responsible for nearly 3 percent of global greenhouse gas emissions

With the amount of cargo moved per ship, sending a product around the globe generates only a fraction of the CO2 in the product lifecycle compared to final truck transport inland. Which again is less than the final car transport to pick up the product at a store and bring it home.

So even producing locally, would still have the same major CO2 factors: Inland truck and car.

Global shipping isn't too bad and the companies want to make their ships more efficient anyway. Fuel is a major cost factor for shipping lines, so to please investors and fill their own pockets, reducing fuel and thereby CO2 is already a necessity. Ships get more advanced hulls, larger cargo holds, more efficient engines with each new generation. It's on a good path on its own.

On a side note, I'm not a fan of calling technology or energy 'clean' or 'green'. We've already seen discussions about clean goal or here we have green methanol. There is just no definition or norm to it, besides being a colour of certain wavelength. No energy form at all is green or clean, but they can be low-CO2 or renewable.