Reuters: Merchant ships can cut their carbon emissions by as much as 30 percent over the next three years by traveling more slowly, a Brussels-based environmental group said on Wednesday. The shipping sector accounts for nearly 3 percent of global carbon dioxide (CO2) emissions and pressure has grown for cuts. A study commissioned by Seas at Risk found that by slow steaming, vessels can reduce their fuel consumption and cut CO2. The study, conducted by Dutch consultancy group CE …