#CarbonCatchers #EcoEducation
The world has never been more digitized, and with many businesses moving online due to the current COVID-19 pandemic, the demand for digital services reaches new heights every day. What many would not suspect, however, is the significant environmental impact of our digital activities.
According to the latest statistics, information and communications technologies (ITC) account for 4 percent of global greenhouse gas emissions - twice as much as the world aviation industry (Jungblu, 2020). A staggering percentage that is predicted to double by 2025, as more than one million people come online for the first time each day (Kemp, 2019).
Where emissions are coming from
Every action that is carried out online comes with a few grams of carbon dioxide being released into the atmosphere. Since the energy used to run the devices and to power the networks mainly comes from fossil fuels, even the smallest online activity - like a search query - can produce anywhere between 0.2 to 7 grams of carbon dioxide emissions (Ho, 2020). If we think about how many people perform digital activities every day, even a few grams of emissions quickly add up to a significant environmental impact.
Among these activities, music and video streaming are one of the main causes of the internet’s high power consumption. Studies show that almost 80 percent of all data flows through the net in the form of moving images (Griffiths, 2020). Online videos alone account for almost 60 percent of global data transfer. The higher the resolution, of course, the more data is sent and received.
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More energy-intensive, however, are the data centres and servers needed to power the internet and store the content that we are so easily able to access through our searches. Despite the difficulty in knowing for certain how much energy is required by all data centres worldwide, current estimates have calculated a range from 200 to 500 billion kilowatt-hours per year, an estimated 1 to 3 percent of the world’s electricity. By 2030, the range is estimated to be between 200 billion and 3,000 billion kilowatt-hours (Stolz and Jungblut, 2019).
The energy required by data centres is not only used to send and receive data streams but mostly to prevent the servers from overheating. Once the data is processed additional energy is required for ventilation so that the servers can be cooled down. On average, mechanical cooling is responsible for around 25 percent of the total power consumption of a data centre (Stolz and Jungblut, 2019). On top of the environmental impact of using large amounts of power to cool down the servers, the heat produced by data centres and that is released into the atmosphere, becomes an additional factor contributing to global warming.
Cloud computing is another major contributor to the high energy consumption of the internet. The more data we store on servers instead of locally on our devices, the more energy the servers will need.
But it doesn’t end there. From manufacturing to disposal, the lifecycle of computers has a significant environmental impact. It’s enough to think that an estimated 50 million tons of electronic waste are discarded each year and most of it is sent to landfills (Maier, 2019).
According to a research article by the University of Edinburgh, extending the life of a single computer and monitor from four to six years could avoid the equivalent of 190kg of carbon emissions (Hart, 2016).
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The amount of emissions varies depending on website traffic, the amount of data transferred over the wire when a web page is loaded, or the amount of energy used at the data centre, telecoms networks and by the end user's computer or mobile device. The energy source used by data centres is also a key factor as many data centres are shifting towards renewables.
Solutions
The environmental impact of our digital operations, even after breaking them down, can feel intimidating. However, there are a multitude of solutions being explored and implemented every day to make sure that the Planet doesn’t pay the price for an increasingly interconnected world. Some countries, like Sweden for instance, are repurposing the heat waste coming from their data centres by redistributing it to residential and commercial buildings via pipes.
Tech corporations are also finding solutions to reduce the carbon footprint of their operations. Google uses a mixture of renewable energy and carbon offsetting, while Microsoft has promised to become carbon negative by 2030 (Griffiths, 2020).
A recent study published in the Journal of Parallel and Distributed Computing offers an alternative solution to decrease the amount of energy used by cloud computing. The research proposes using multi-cloud computing and storage services in different time zones, instead of a single one, to run applications, services and capabilities. By estimating the amount of solar power that each location will need depending on its time zone, the study suggests that it is possible to reduce the usage of energy produced with fossil fuel and maximize the use of renewable energy at different locations. (Xu and Buyya, 2020)
It’s not only up to governments and corporations, however, users can do their part too. Offsetting the CO2 emissions of your website, for instance, can be an easy and affordable starting point for both individuals and businesses. There are numerous ways to do that depending on your means and needs. The Tree-Nation Offset Website service, for instance, allows you to place a smart label on your website to calculate and offset all of your website's CO2 emissions by automatically planting trees.
Trends
- Computing is expected to account for up to 8% of global power demand by 2030.
- There are over 4 billion internet users as of January 2021, an increase of over 7 percent compared to the previous year.
Calculations
- A typical business user creates 135kg CO2 from sending emails every year, which is the equivalent of driving 200 miles in a family car.
- Data centres are generally rated for energy efficiency using a metric called Power Usage Efficiency, or PUE. The PUE is determined by dividing the amount of energy entering the data centre by the amount of energy used to run the computers inside it. The typical PUE for a data centre is around 1.67, meaning that for every 1.67 watts going into the data centre, only 1 watt is being used to power the computing systems.
References
- Griffiths, S., 2020. Why your internet habits are not as clean as you think. BBC, Accessed February 2021, https://www.bbc.com/future/article/20200305-why-your-internet-habits-are-not-as-clean-as-you-think
- Kemp, S. 2020. Digital trends 2020: every single stat you need to know about the internet. The Next Web, Accessed February 2021 https://thenextweb.com/growth-quarters/2020/01/30/digital-trends-2020-every-single-stat-you-need-to-know-about-the-internet/
- Stolz, S. and Jungblut, S., 2019. Our digital carbon footprint: what’s the environmental impact of the online world?. Reset, Accessed February 2021 https://en.reset.org/knowledge/our-digital-carbon-footprint-environmental-impact-living-life-online-12272019
- Greenwood, T., 2019. 17 ways to make your website more energy efficient. Whole Grand Digital, Accessed February 2021
https://www.wholegraindigital.com/blog/website-energy-efficiency/ - Xu, M. and Buyya, R., 2020. Managing renewable energy and carbon footprint in multi-cloud computing environments. Science Direct, Accessed February 2021
https://www.sciencedirect.com/science/article/abs/pii/S0743731519303132 - Ahlgren, M., 2021. 100+ internet statistics and facts for 2021. Website Hosting Rating, Accessed February 2021 https://www.websitehostingrating.com/internet-statistics-facts/
- Kemp, S., 2019. Digital 2019: Global internet use accelerates. We Are Social, Accessed February 2021 https://wearesocial.com/blog/2019/01/digital-2019-global-internet-use-accelerates
- Jungblut, S., 2020. What’s the carbon footprint of your website?. Reset, Accessed February 2021
https://en.reset.org/blog/whats-carbon-footprint-your-website-01162020 - Ho, S., 2020. How Much CO2 Does Your Social Media Habit Cost The Planet? New Tool Visualises Emissions From Internet Activity. Green Queen, Accessed February 2021 https://www.greenqueen.com.hk/browser-extension-carbonanalyser-visualises-emissions-from-internet-activity-co2-social-media/
- Maier, C., 2019. How do computers pollute the environment?. Sciencing, Accessed February 2021 https://sciencing.com/how-do-computers-pollute-the-environment-13660586.html
Hart, J., 2016. Carbon Emission Implications of ICT Re-use at the University of Edinburgh. University of Edinburgh, Accessed February 2021 https://www.ed.ac.uk/files/atoms/files/pc-carbonfootprints-jh-ecci2.pdf
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