Unless we save endangered animals, they will become extinct., There will be more pollution unless we become more environment-friendly., Unless people reuse items, there will be a shortage of natural resources., If people start protecting the planet, it will not be destroyed., Lots of places will face drought if we don´t start saving water., If people look plant more trees, the air quality will improve., Unless mr. Putin comes to his senses, thousands of people will die., We will face mass destruction if world leaders don´t stop the war in Ukraine., If there is a shortage of fossils fuels, scientists will need to find alternative sources of energy., Unless we change our habits, the planet won´t be saved.,

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