KTH Royal Institute of Technology is the largest and most respected technical university in Sweden—ranked top 100 in the 2020 QS World University Rankings. KTH Royal Institute of Technology offers the opportunity to complete a doctoral degree (PhD) in a dynamic, international research environment that features world-class facilities as well as close collaboration with industry and other prominent universities worldwide. Being the largest and highest ranked technical university in Sweden, KTH provides excellent conditions for its 2,000 doctoral students. KTH contributes to sustainable development by providing educational programs, conducting research and by interacting with the surrounding community. Through its activities, KTH also impacts the environment in practical terms through the consumption of materials and water, energy and chemicals, travel and transport and construction, and indirectly through purchasing and procurement. The School of Engineering Sciences in Chemistry, Biotechnology and Health conducts research and education in areas that cover several global challenges. Among them are the need of sustainable energy, health and aging population, climate change, sustainable production and working life, food production and clean water.