Environmental issues are close to the heart of Greek shipowner Ioannis Alafouzos. Since the late 1980s, he and his family have been involved in a range of projects, from beach cleaning to contributing to the planting of more than 2.5 million trees.

Now, new emissions laws due to arrive in 2020 have contributed to the family’s first public shipping company, Okeanis Eco Tankers. Alafouzos has taken a fleet of vessels worth over $1bn to Oslo’s Merkur Market, with a view to a more senior listing, at a time when he expects incoming sulphur legislation to shake up the big tanker sector.