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In fact, for your information, in the few seconds it took you to read these first lines, Google will have already emitted
more than 40 tons of CO2: http://www.janavirgin.com/CO2/
That is 500Kg of Co2 produced per second….
Edifying, right?
Even though Google is aware of its carbon footprint and its founders implemented less energy-intensive processes
early on in the development of their data centers, including investments in clean energy and numerous carbon offset
programs, Google’s infrastructure still emits a significant amount of CO2. And unfortunately, growing every year.
But what can you do about it? After all, you and your website cannot be held responsible for this. You are doing your
part and a priori, you have not asked Google for anything even if, in reality, you depend on it considerably (for traffic on
your site).
In fact, what you could do, which could impact globally (if all users did) the production of CO2 emitted by Google to read
the Web, organize the information and allow users access to it, would simply be to simplify the work that Google has to
do, through its indexing robots (crawlers), when they visit your website.
You may not know it, but your website is not limited to the pages you create with your content, nor to what is visible in
search results. Your site contains an astronomical amount of internal links, intended strictly for its operation, to generate
interactions between pages, to filter results, to organize content, to allow access to certain limited information (useful for
your developer but not for your visitors), etc. And when your site is made available for crawling by search engines (so,
concretely, when your site is published online), crawlers systematically try to visit all the links it contains in order to
identify the presence of information, index it and make available. But, and this part is important, exploring/crawling your
website (which, let’s remember, is almost continuous) requires power, a lot of energy, both from crawlers (search
engine servers) and also from your own hosting server.
That’s why, very early on, in the continuous improvement processes of its crawling system, Google, for example,
defined a limit to the number of links a robot could explore in a session. And the reason is simple. The power required
by indexing robots to explore your site directly impacts the performance and efficiency of your website. In other words,
your website, during the process in question, if your hosting is limited (which is very common), is slower to load the
pages and content it contains when visited (the processor and RAM being directly impacted).
However, this limitation, called “crawl-budget” is not a general rule applied by all (known) search engines and certainly
not by the thousands of “web” robots (“scrapers”) continuously visiting, copying, analyzing, the Web in general.
Nowadays, more than 50% of the world’s traffic on the Web is generated by… robots. And not humans. So we are not
alone.
Last but not least, it is very common, sometimes due to the colossal size that some websites can have (online store,
etc.) that crawlers are “blocked” in certain parts of a site. In other words, indexing robots crawl a huge amount of links
(sometimes infinite, if there are loops), non-essential, specific for example to online calendar features (where every day,
month and year are pages, explorable) and from which it is no longer able to “leave”, due in particular to its limitation to
the number of links it can explore, thus having the direct consequence of impacting the overall exploration of your site
and finally, the accessibility of your important pages (articles, services, products, etc.). This may explain, for example,