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<p>Like many others, the august institution that I work for has set
itself the goal to score better in the international university
rankings.</p>
<p>There are brownie points in rankings these days when it comes to
sustainability. You just wish that university management and those
who do the ranking actually understood sustainability.</p>
<p>So at a lot of universities, they have discovered (or at least
think that they have) that exams on paper are bad, and that going
online is environmentally friendly. That's because that paper
requires a lot of trees to make (ignoring for a moment that many
modern papers contain large amount of recycled paper).</p>
<p>On the Internet, we learn that making 1 metric ton of paper
causes about 1 ton of CO2 emissions. Wow that's a lot. Now the
exam scripts for my students are usually under 20 pages A4. An A4
page weighs about 5 grams. So my entire exam is 100 g or less in
CO2 emissions from paper. Add another 20 g CO from printing.</p>
<p>Now my experience is that if you let students sit online exams,
around half of the class will cheat. These days, you do that with
ChatGPT. Now let's assume there are 10 questions in the exam, and
each takes two queries to ChatGPT to get right. I've asked ChatGPT
how much CO2 a query to it produces, and it says between 5 and 20
grams. So we'll get between 100 and 400 g of CO2 here. Say 250 g
on average. That's around 125 g per student, slightly more than
producing a printed exam produced. Add to that the power used by
student devices, and the paper exam looks positively
environmentally friendly again. <br>
</p>
<div class="moz-cite-prefix">On 28/11/2024 11:39 pm, David Fernández
via Starlink wrote:<br>
</div>
<blockquote type="cite" cite="mid:CAC=tZ0qEvtz6buo2hhqvV0nwU4JAf_r1kvAo_ve=KsXCZ3yZQw@mail.gmail.com">
<div dir="ltr">
<div>Hi Hesham,</div>
<div><br>
</div>
<div>You may check this report, in case you missed it, for ideas
on how to reduce energy consumption and carbon footprint, in
general for the audiovisual sector, but satellite distribution
of video may be considered there:</div>
<div><a href="https://en.arcep.fr/news/press-releases/view/n/environment-071024.html" moz-do-not-send="true" class="moz-txt-link-freetext">https://en.arcep.fr/news/press-releases/view/n/environment-071024.html</a></div>
<div><br>
</div>
<div>You may be interested in following this IETF group, too:</div>
<div><a href="https://datatracker.ietf.org/group/green/about" moz-do-not-send="true" class="moz-txt-link-freetext">https://datatracker.ietf.org/group/green/about</a></div>
<div><br>
</div>
<div>This workshop already happened, but you may get something
from there too, about the development of energy neutral
devices:</div>
<div><a href="https://6g-conference.dnac.org/2024/en-iot-2024" moz-do-not-send="true" class="moz-txt-link-freetext">https://6g-conference.dnac.org/2024/en-iot-2024</a></div>
<div><br>
</div>
<div>Considering that most of the CO2 is emitted during a device
fabrication (e.g. 79% for laptops, according to Atos), making
them last long and being modular and repairable may be the
best way to reduce the carbon footprint (and the increasing
amount of e-waste).<br>
</div>
<div><br>
</div>
<div>Regards,</div>
<div><br>
</div>
<div>David</div>
<div><br>
</div>
<div>
Date: Sat, 23 Nov 2024 11:16:11 -0800</div>
From: Hesham ElBakoury <<a href="mailto:helbakoury@gmail.com" target="_blank" moz-do-not-send="true" class="moz-txt-link-freetext">helbakoury@gmail.com</a>><br>
To: Dave Taht via Starlink <<a href="mailto:starlink@lists.bufferbloat.net" target="_blank" moz-do-not-send="true" class="moz-txt-link-freetext">starlink@lists.bufferbloat.net</a>><br>
Subject: [Starlink] Reducing Eenergy Consumption and <span class="gmail-il">Carbon</span> Foot Print<br>
of <span class="gmail-il">Satellites</span>
Network<br>
Message-ID:<br>
<CAFvDQ9p6R9wdGFri3YPdU5=<a href="mailto:25FjyD6iN5yT%2BoW7XkgCZk77bow@mail.gmail.com" target="_blank" moz-do-not-send="true">25FjyD6iN5yT+oW7XkgCZk77bow@mail.gmail.com</a>><br>
Content-Type: text/plain; charset="utf-8"<br>
<br>
I appreciate your input and pointers to publications regarding
how to<br>
reduce energy consumption and <span class="gmail-il">carbon</span>
<span class="gmail-il">footprint</span> of <span class="gmail-il">satellites</span> network.<br>
<br>
Thanks<br>
Hesham<br>
</div>
<br>
<fieldset class="moz-mime-attachment-header"></fieldset>
<pre wrap="" class="moz-quote-pre">_______________________________________________
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</pre>
</blockquote>
<pre class="moz-signature" cols="72">--
****************************************************************
Dr. Ulrich Speidel
School of Computer Science
Room 303S.594 (City Campus)
The University of Auckland
<a class="moz-txt-link-abbreviated" href="mailto:u.speidel@auckland.ac.nz">u.speidel@auckland.ac.nz</a>
<a class="moz-txt-link-freetext" href="http://www.cs.auckland.ac.nz/~ulrich/">http://www.cs.auckland.ac.nz/~ulrich/</a>
****************************************************************
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