To determine CO2 levels before the introduction of modern stations, scientists must use so-called proxy measurements.

BBC: Carbon dioxide passes symbolic mark

Reducing water use at its buildings, cutting down on non-essential travel and the construction of modern energy efficient stations to replace existing ones have been among suggestions of the ways in which HIFRS could cut CO2 emissions.

BBC: Highlands and Islands brigade aims to cut CO2 emissions

If a full-fledged media blackout isn't feasible, then at least limit yourself to the stations that are least likely to air anything having to do with modern times: the radio stations that play big band music and old-timey radio programs.

CNN: How to avoid Olympics spoilers

With the spread of Arab satellite stations, a modern Ramadan tradition has taken off.

NPR: Arab TV Show Dramatizes Lives of Suicide Bombers