"It has been a stimulating task to select the Guest Professors, with the help of our scientific academies based on proposals from our universities.
"This is the first time that we have gathered all of them at the same time. I am very pleased that you have all been able to come. You represent a range of different disciplines and together you illustrate the complexity of global ecosystems.
"Climate change is a major concern. Demand for energy is increasing all over the world and emissions of greenhouse gases are growing. I look forward to hearing more about these challenges from our professors today."