Crossword Puzzle ENVIRONMENTAL EDUCATIONOnline version Activity just for practice by Diego Alejandro Ospina Cardona 1 a colourless, transparent, odourless liquid that forms the seas, lakes, rivers, and rain and is the basis of the fluids of living organisms. 2 keep safe from harm or injury. 3 the weather conditions prevailing in an area in general or over a long period. 4 unwanted or unusable material, substances, or by-products. 5 use again or more than once. 6 bring someone or something to (a worse or less desirable state or condition). 7 return (material) to a previous stage in a cyclic process. 7 5 4 3 1 6 2
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