What geologic era is known as the age of mammals?

The Cenozoic era, because it is when the first mammals evolved/ lived on earth for the first time.

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sincerely carter12

Air pollution: “combustion results in gases such as nitrogen oxides, nitrogen dioxide and particulates. the main causes of air pollution include transport, domestic combustion and industrial processes. pollutants from these sources can cause problems in the immediate vicinity and a distance away.”