Make sentences: My home hasn't installed a solar water heater. If/ my home/ install/ a solar water heater/ wel save a lot of energy

3. Make sentences.
1. My home hasn't installed a solar water heater. If/ my home/ install/ a solar water heater/ wel save a lot of energy.
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1. Noise pollution/ any loud sounds/ either harmful or annoying/ humans and animals.
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2. Generally/ noise produced/ household appliances/ big trucks/ vehicles and motorbikes/ on the road/ planes
helicopters flying over cities/ loud speakers, ets.
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3. A large number of people ride their motorbikes to work. If/people/ ride/ bikes/they/ keep/ air/less polluted.
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4. That factory doesn't have a wastewater treatment system. If/ that factory/ havel wastewater treatments river/ not become so polluted.
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