Please help wuick
Which energy resource produces the least amount of air pollution?
A.) coal
B.) hydropower
C.) oil
D.) natural gas

My guess would have to be hydropower, since water isn't an un natural substance

air, water, heat and noise pollution can all be caused by producing and using technology. consuming resources - non-renewable resources, including precious metals like gold, are used to make technology

the  frequency of a wave represents  the number of wavelengths that pass a specific point per second. the unit for  frequency  is hertz (hz).

happy to

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