Earth / Energy Consumption / Wireless networks / Energy efficiency / Global Warming / Wireless Network / Energy efficient / Wireless Access Network Deployment Strategy / Energy Efficiency / Small Cells / Point of View / Wireless Communication / CO 2 Emission / Proof of Concept / Wireless Network / Energy efficient / Wireless Access Network Deployment Strategy / Energy Efficiency / Small Cells / Point of View / Wireless Communication / CO 2 Emission / Proof of Concept