If we recycle, we create less waste and pollution., If we use public transport, the city will have cleaner air., If governments invest in recycling programs, waste will decrease., If you waste water, rivers dry up., If students learn about sustainability, they will make better choices in the future., If temperatures rise, ice melts., If companies stop cutting forests, animals will have safe habitats., If people use renewable energy, they will reduce their carbon footprint., If trees absorb CO₂, the air is cleaner., If the air is polluted, people get sick.,

Zero and first conditional

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