In this activity students consider the questions:

• How can the purity of swimming water be tested?
• What exactly is the Blue Flag award?
• How reliable are the measurements and the criteria for the Blue Flag award?
• What is the status of the quality of fresh and salt water for swimming...

In this activity students consider the questions:

• What are the main sources that cause severe water shortage in Europe?
• How different harmful elements (e.g. fertilizers, gasoline, sulphuric acid) pollute freshwater?
• What methods / strategies can be used to save water?
• What methods...

In this activity students take on the role of Earth observation scientists submitting a request for an image they would like for their research. This gives them the opportunity to consider the possibilities of pictures taken from orbit (and the limitations) and to write scientifically for a specific audience. It...