Climate change ____ people in poor countries more than in the developed world. We'll ____ natural resources if we don't stop buying things we don't need. The standard of living of people in rich countries will continue to ____ in the coming years. We ____ that air pollution will be the biggest risk to people's health in the future. Social media and the Internet ____ our private lives. A recent study ____ that by 2050, 2.5 billion people will live in cities and this could create many social and environmental problems.

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