If the weather is good on Sunday, - ... we will go to the beach., The evironment will suffer - ... if we don't recycle more., If we use renewable energy, - ... it will provide us with cleaner air and water., If we burn coal and oil, - ... we put more CO2 into the air and cause air pollution., If we use energy-saving light bulbs, - ... we may save up to 18% on our electricity bill., If the Greenland ice sheet completely melts, - ... the global sea level would rise by about seven meters.,

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