With European governments pushing to cut carbon emissions and tackle climate change, the global movement of goods by air is coming in for scrutiny.
The UK imports millions of tonnes of fresh produce every year and Kenya has long supplied our local supermarkets with fresh flowers.
Four in 10 roses in the UK come from the African nation with the vast majority flown in.
North of Nairobi in Kenya's Rift Valley, the Oserian company employs 4,500 people to grow, pack and move one million stems each day.
Every one of those flowers is destined for Europe.
Sky News visited the vast site and spoke to the workers about their fears that demand could drop and vital jobs could be lost