Matching Pairs c16u11lb VocabOnline version match the words with the pictures by Rodrigo Casas 1 AIR POLLUTION 2 ENERGY-SAVING 3 GLOBAL WARMING 4 WATER CONSUMPTION 5 TOXIC CHEMICALS 6 ENVIRONMENTALLY FRIENDLY 7 NATURAL RESOURCES 8 LANDFILL 9 DROUGHT 10 BIODEGRADABLE