Changes

* [[Timeline of pollution]] (expand): - ** The economics of pollution (in particular, discussion of the concept of externalities, tragedy of the commons) - ** Environmental Kuznets curve)* [[Timeline of mobile telephony]] (expand): ** Voice over IP calling (for timeline of mobile telephony)- ** Wi-Fi calling (for both timelines)- ** The nature of mobile phone voice and data plans, and how these have evolved over time - ** Cellular connectivity in underground areas, such as subways (I have some example events in https://timelines.issarice.com/wiki/Timeline_of_Bay_Area_Rapid_Transit - Move to IPv6 - tethering and hotspots created by mobile phones are worth mentioning, maybe in both timelines )** tethering and hotspots created by mobile phones are worth mentioning, maybe in both timelines * [[Timeline of Wi-Fi]] (expand): ** Wi-Fi calling (for both timelines)** Google Wi-Fi, e.g., Starbucks moving from AT&T to Google Wi-FI - ** tethering and hotspots created by mobile phones are worth mentioning, maybe in both timelines )