Ports around the world are looking at implementing drones to detect vessels breaking pollution levels.
According to a report from Bloomberg, the Netherlands is currently preparing to use a large UAV to detect emissions from ships.
In Hong Kong, where rule breakers face large fines and up to six months in prison, similar but smaller drones are being tested for the same purpose.
The Bloomberg report goes on to detail how maritime authorities in Denmark and Norway have also already started using the technology.
Authorities can use drones to filter through the ships coming in and out of their ports and learn in advance if a ship is burning non-compliant fuel.
Drones have been used to fight pollution in the past and earlier this year, CDP reported on how water spraying drones were being deployed.
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