Of the Earth's total freshwater supply, identify the approximate percentage that is stored underground as groundwater.
1%1\%1%
3%3\%3%
30%30\%30%
69%69\%69%
52 exam-style questions on Edexcel A GCSE Geography Overview of the global and UK distribution of food, energy and water. Each one has a worked solution and a mark scheme showing where the marks go.