Gap-fill exercise

Fill in all the gaps in the text with the words below, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble.
frozen salt resource wisely water

Did you know that less than 1% of all the on Earth can be used by people? The rest is water (the kind you find in the ocean) or is permanently and we can't drink it, wash with it, or use it to water plants.
As our population grows, more and more people are using up this limited . Therefore, it is important that we use our water and not waste it.