The number of Green ICT conferences and workshops to decline, now to only half as many as in 2013. They have almost disappeared from North America and Asia/Pacific, with Europe hosting over half. The good news is that we listed one in Africa and one in the Middle East.

The 'recovery' in the number of Green ICT conferences we saw in 2016 now appears to be an outlier and the 2013-2018 trend is clearly downward.

The original directory of upcoming and past Green IT conferences is now the Green ICT Conference Directory. We did this because of the increasing number that include or focus on sustainability in communications - the "C" in Green ICT

(The chart, based on our Green ICT conference directory, counts co-located events as one.)

We took a look at the use of Twitter to promote GreenICT events during the six-month period running from Nov 2015 to Apr 2016. Only 1 in 14 — 7% — had an event-specific account or hashtag. We speculate that this reflects the academic culture of the organizers for many of these events. The situation appears not to have changed during 2017 and 2018.