sentence: Water is very important for life.
sentences_before: Lakes, oceans, and rivers are made of water. Rain is water that falls from clouds in the sky. If water gets very cold, it freezes and becomes ice. Frozen rain can be ice or snow if conditions permit. If water gets very hot, it boils and becomes steam.
sentences_after: However, some studies suggest that by 2025 more than half of the people around the world will not have enough water.
concept_name: water
headings: Water
categories: Natural resources Hydrogen compounds Oxygen compounds Oxides