Tighter regulations on exhaust emissions are prompting rapid change within the global shipping industry. Orders for scrubber systems have soared higher than before, suppliers of emissions monitoring software are rapidly taking increasing orders, and the market for natural gas-powered engines continues to break new ground. Choosing the most cost-effective way to reduce exhaust emissions is vital for the industry. Regulations for Emissions Control Areas (ECAs) are now enforced across many countries and there are further designation zones under discussion.