What is the green internet? A guide to digital sustainability

The internet doesn’t exist in abstraction. The things that make the internet work, like host servers and domain names, all rely on data centers—which require a lot of energy to run. That means the internet has a physical impact, and a big one too. Each time you search something on Google, buy something online or create and host a website, it releases carbon dioxide into the atmosphere.For the eco-conscious user, this might present a bit of a dilemma. How can you enjoy all the benefits of the internet without impacting the environment? After all, apps and websites have become so integral to our daily lives that it’s hard to imagine life without them.This is where the concept of the green internet comes in. Through innovations in eco-friendly and sustainably powered data centers, a more sustainable internet is possible. In this blog, we explore how.

What does “green internet” mean?

The concept of a green internet is simple: an internet that has less impact on the environment. As it currently stands, the internet as a whole isn’t very green. In fact, it accounts for about 3.7% of the world’s total carbon emissions. Much of this carbon is emitted from energy needed to run and cool the servers that host the websites and apps. These servers transfer huge amounts of data, minute by minute.

Some of the world’s largest data centers each contain many tens of thousands of servers, requiring more than 100 megawatts (MW) of power capacity. Enough to power around 80,000 households in the US. Much of this power still comes from fossil fuel extraction.Studies have shown that the videos streamed by YouTube’s 1.4 billion users generates around 11 million tonnes of CO₂ emissions per year—roughly equivalent to the annual emissions of a city like Frankfurt or Glasgow. And that’s just from one platform.The average web page alone emits around 0.8 grams of CO2 per page view. That may not seem like much, but for a website with 10,000 monthly page views, that amounts to 102 kg CO2e per year.

The connection between internet usage and carbon emissions is clear. So, what can we do about it? That’s what the idea of a green internet sets out to resolve.

Why sustainability in web hosting matters

The emissions caused by the internet imposes a very real environmental cost. By 2030, computing and technology-related electricity usage could account for up to 23% of global greenhouse gas emissions.So if we’re going to tackle the climate crisis, we need to rethink our relationship with digital technology, and look for solutions to reduce its hidden impact.Fortunately, as awareness of these issues grow, so does consumer demand for ethical solutions. In a 2023 survey, seven in ten consumers consider a company’s environmental responsibility a key factor in their purchasing decisions.

How green web hosting works

Eco-friendly hosting is built on the principle of powering digital infrastructure with 100% renewable energy sources like wind and solar, eliminating reliance on fossil fuels such as coal and oil.It also relies on energy-efficient data centers, optimized to consume less electricity through strategies like improved lighting, streamlined cooling systems, and better hardware management.A key benchmark for green hosting efficiency is Power Usage Effectiveness (PUE). The lower the PUE, the more effectively a data center converts energy into computing power rather than waste heat.

Liquid cooling

Liquid cooling uses water to safely dissipate heat from high-performance CPUs and GPUs. When widely implemented, this technique canreduce total data center energy use by over 10%, while improving both IT and facility efficiency. That said, liquid cooling can be energy-intensive, as it often depends on both water and mechanical refrigeration. In contrast, approaches like free cooling — where naturally cool outside air is used to regulate system temperatures — eliminate the need for mechanical chillers and can cut water usage for cooling by an average of 84% compared to traditional methods.

Proximity

Proximity to data centers enhances environmental performance by shortening the distance data must travel, which cuts transmission-related energy usage and speeds up website performance—particularly when paired with CDNs or edge servers. For example, Spaceship recently set up a datacenter in Singapore, so users in Asia can host their apps and websites without having to rely on servers in the US or Europe.

Virtualization

Technologies like virtualization play a major role in more efficient hosting. It allows multiple virtual machines to run on a single physical server, reducing both power consumption and the number of machines needed.

While some web hosting providers also engage in carbon offsetting, such as funding tree planting or renewable energy projects, it's important to note that not all offsets are effective—over half of approved offsets may not deliver true additional benefits, and some may unintentionally increase emissions.

Ultimately, true green hosting is about designing systems that are efficient from the ground up, not just compensating for their impact after the fact.

What makes a hosting provider eco-friendly?

When evaluating eco-friendly hosting providers, look for key features that reflect genuine commitment to sustainable web practices.

Green certifications can help identify eco-friendly hosting providers. One reliable certification is the ISO 50001, which supports energy management through data-driven policies and continuous improvement.There’s also ISO 14001, which guides organizations in reducing their environmental impact through structured environmental management systems.Certifications are a good starting point, but they don’t guarantee that a hosting provider is truly eco-friendly. To get a clearer picture, look into the actual sustainability measures in place. Ask about things like:

• Low Power Usage Effectiveness (PUE), which indicates how efficiently energy is used by their servers.

• Whether they’re powered entirely by renewable energy sources, such as wind or solar.

• If they use energy-efficient infrastructure, including free cooling systems and low-power, high-performance hardware.

Green hosting isn’t only about lowering environmental impact — it also reflects a broader effort to support ethical and secure digital infrastructure.For example, Spaceship Web Hosting uses sustainable data centers in the UK, the EU and Singapore, powered by 100% renewables. They also comply with globally recognized standards like ISO 50001, ISO 14001 and Green Power Pass.

Other ways to support a greener internet

Even if you're not managing servers directly, the infrastructure behind your website, app, or e-commerce store plays a big role in your environmental impact. Here are some ways you can reduce it:

• Optimized Linux kernelsthat reduce CPU usage by minifying code and web assets so each user interaction uses up less energy.

• Content delivery networks (CDN) that deliver cached web content from the closest location to the user, reducing load times, conserving energy, and minimizing the distance data needs to travel.

• Optimized images and mediathat removes unnecessary data such as EXIF information to reduce the overall file size. Stripping away this extra data leads to lower storage requirements and energy consumption in data centers.

• Lightweight themes that take less time and energy to load.

• Reduced scripts and server calls contribute to lower power and energy required to load a website. Fewer scripts mean less work for servers and user devices, leading to faster load times, reduced data transfer, and decreased energy consumption in both the data center and end-user environment.

Implementing these energy saving tactics can speed up page load times, reduce resource usage and improve SEO, all while helping reduce your individual impact on the environment.

The future of digital sustainability

The path toward a more environmentally sustainable internet is being shaped by a combination of technological innovation, regulatory action, and shifting consumer expectations. In the future, you can expect to see:

• Greener data centers that use energy-saving techniques like free cooling, a method that harnesses outside air to cool servers, dramatically cutting down the need for power-hungry chillers.

• Software efficiencyfrom better coding practices and smarter system operations could lead to lower energy demands at every level of the stack.

• Government policies are being implemented throughout the world to reduce the internet’s carbon footprint. That includes introducing stricter sustainability regulations and initiatives such as the EU Green Deal, Defra’s ICT Sustainability Strategy (UK), the U.S. Data Center Optimization Initiative (DCOI), and EU-wide sustainability rating systems for data centers.

• Consumer behavioris playing a powerful role in driving change. Studies show that 46% of people are buying more sustainable products to reduce their environmental impact, and over 80% are willing to pay more for goods and services that are ethically and sustainably produced.

A greener internet is possible

Digital activity comes with a hidden environmental cost—from the energy consumed by data centers to the emissions generated by online services. But the good news is, your choices matter.Opting for green web hosting is a simple yet powerful way to reduce your digital footprint and support a more sustainable internet.