Farmland has been on the decline in Europe for years, due to growing urbanisation. The move to protect and increase forest areas has also had an impact, making greenhouse farming more relevant than ever. While greenhouses enable farmers to produce more with less, their warm and moist conditions also allow for infestations to spread rapidly: pests and diseases cause around 15 % of losses for an average greenhouse in the EU. The EU-funded GREENPATROL project has designed a solution that could help farmers tackle this issue while minimising the use of chemical insecticides. It uses Galileo, Europe’s Global Navigation Satellite System (GNSS), to guide a robot inside the greenhouse which can autonomously detect pests, apply treatments and monitor infestations.