What Is Green Computing?

Green computing, also known as greentech or green IT, is the environmentally conscious design, manufacturing, use and disposal of computers and related technologies in a manner that minimizes environmental impact.

Thanks to the passage of the Inflation Reduction Act and the CHIPS and Science Act in 2022, and the Artificial Intelligence Environmental Impacts Act in 2024, green computing stands to become one of the more pressing topics for companies. The United States looks to invest several billion dollars into zero-carbon technologies, clean energy research and reducing greenhouse gas emissions.

Even so, “there’s no silver bullet,” said Soudip Roy Chowdhury, founder and CEO of Eugenie.ai, an AI-powered platform supporting industrial companies in achieving sustainable operations. “Multiple initiatives together will help the world to achieve net zero.”

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What Is Green Computing?

Green computing is a set of practices that involve using computers and their components in an environmentally friendly way.

It includes initiatives like a company reducing their climate impacts and minimizing their carbon footprint, the specific actions of which can range considerably.

“It’s not just what temperature we keep the data center or if there’s enough diesel to backup the generators if the power goes out,” said George Burns, senior consultant of cloud operations at SPR, a technology modernization firm. “It’s so many other things, all the way down to the code that we feed in.”

According to Sreejit Roy, green IT offering leader and senior partner at IBM, green computing is all about the reduction of power consumption for compute, network and storage. 

“If we are able to reduce the power consumption of these three components that comprise the whole — from the data center to the software we write — [that] is what we call green computing,” Roy said. 

 

Why Is Green Computing Important? 

Green computing is important for the environment — and the companies that practice it — for a few reasons:

Reduces Technology’s Ecological Footprint

Green computing stands to reduce technology’s impact on climate change and can aid in net-zero efforts. It emphasizes lowering technologies’ emissions and their reliance on fossil fuels, as well as recycling electronics and e-waste properly.

Reduces Energy Costs

Implementing green-computing solutions and energy-efficient technologies can lower electricity usage over time. In turn, this will also reduce energy costs for businesses and users in the long run.

Boosts Company Reputation 

Companies that embrace green IT stand to have better reputational success. Advocating for environmental sustainability can help brand a company as socially responsible and empathetic toward global issues. This can also lead to increased interest from job candidates and retention of existing employees.

Prepares Companies for Regulations and Compliance

Companies that already implement green computing technologies in their work may have an easier time complying with regulations around technology emissions in the future. Plus, it could save companies money on having to set up new technologies and processes if additional regulations arise.

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Green Computing Examples 

A green computing strategy may involve all or some of the following actions:

Updating Tech and Architecture

Much of green computing looks like updating technologies to be more efficient and consume less energy.

“I can change from the old servers to the new servers, or I can change the architecture of the servers, or I can change what goes into the server from what we’re calling as monolithic to serverless, which are different kinds of architectures, which will significantly reduce the carbon footprint,” Roy said. “If nothing else, companies can simply take their workloads and move it to cloud.”

Using Cloud Storage

Roy estimates that transitioning operations to the cloud can help some tech companies improve their carbon footprint by as much as 60 to 80 percent. Yet, definitively measuring the environmental impact of cloud servers, especially private ones, is challenging. 

Storing Data Locally

For companies with employees across the globe, using networks that store data locally can save energy. For example, Roy, who is based in Bangalore, India, expects that when accessing data in the United States, it takes two or three hops across network devices to get the data. 

“The moment I start designing my architecture, designing my IT systems in a way that I do not go to those multiple hops, I’m consuming less network, and hence again, consuming less power, and hence again, consuming less energy, and hence less CO2,” Roy said. 

Creating Digital Twins to Identify Inefficiencies

Companies can create a digital twin, which is a real-time virtual representation of a system used for simulation and decision making. The digital twin can help identify areas where businesses can reduce waste and improve production.

“We simulated a scenario like what if you change this parameter by X with different numbers,” Chowdhury said. “Think of it like you are seeing the future. Whatever you change any of these parameters … that helps them to really understand at real time what the right setup for set points [should be].”

Using Virtual Machines

The creation of multiple virtual machines on a single computer can reduce energy consumption — the more densely an infrastructure is virtualized, the less carbon emissions released. The IBM research team offers a proprietary tool that can provide such insight to companies. 

“The moment I’m able to get at the virtual machine level, then I know by mapping it, which application is consuming more energy, and I can then focus on those applications, or I can focus on those unused VMs to reduce my power consumption,” Roy said. “That is an actionable insight. And unfortunately, not too many of the companies are able to provide that actionable insight. 

Analyzing Application Performance

Burns encourages companies to analyze their applications’ performance and not stick with a software just because the company has invested in or even built it. Maintaining outdated or inefficient applications is wasteful and a prime example of sunk cost fallacy.

“Once you start breaking the code down, you break down the compute. You break down the storage. That’s a big part of it. Application modernization will have a huge effect on resource consumption for computing,” Burns said. “It’s time to decouple them. If you are looking for what is the low hanging fruit that I can grab onto easiest to make a green investment and green return for my organization? It starts with application modernization.”

Applying Edge Computing

Edge computing, an IT architecture that brings computing and data storage closer to the data source, is a potential green computing practice, which can contribute to a reduction in energy consumption.

“Locality of what we do becomes a big part of how we consume computing resources,” Burns said. “We consume the network differently. Those consumers are where a lot of our resource consumption occurs still, so we move things to the edge so that they consume less power.”

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Challenges of Green Computing

While green computing can sustain the environment and save long-term business costs, it can also present challenges, including:

Costs of Replacing Equipment

Replacing existing technologies with green computing solutions can be costly. Companies may have to make a substantial investment upfront to make the switch to green equipment, and likely won’t see a return on investment right away. Overhauling existing systems can also disrupt company processes and require training for new technologies that are implemented.

Lack of Green Computing Awareness and Expertise

Computing and the IT industry’s impact on the environment aren’t often considered in comparison to industries like energy or transportation. As such, tech companies may not be aware of the role their products and operations play in affecting the planet, and can lack the expertise needed to prioritize and implement green computing practices.

Environmental Impact Is Hard to Measure

Much of the challenge around green computing is in measuring and reporting a company’s environmental impact, Chowdhury said. The industry needs a “consolidated data approach,” where not just one, but all companies within a sector, know where the industry benchmark is. It’s important so that companies can measure and work toward a goal in a sustainable way.

Public cloud services offer clearer measurements of how much power is being consumed, but Roy estimates that very few companies operate entirely on a public cloud. 

“The challenge is identifying, first of all, how much data, how much carbon is being pulled, what the carbon footprint of that nonpublic cloud portion is,” Roy said. “The measurement of that is not matured enough at all.”

Companies Can Be Resistant to Change

Ultimately, green computing requires a cultural shift to become a part of tech companies’ business practices.

“That cultural change is what we think is extremely important going forward for all those organizations,” Roy said. “They have to put sustainability as what we’re calling NFR, or a nonfunctional requirement, into everything they do, from architecture, to design, to develop, to test and deploy. If they do not do that, going forward, they are going to be in big trouble going forward.” 

 

History of Green Computing

Green computing entered the mainstream in 1992 when the U.S. Environmental Protection Agency (EPA) launched the Energy Star program. Directed in partnership with the U.S. Department of Energy (DOE), the Energy Star program uses set standards to determine if consumer electronics and commercial equipment are energy-efficient, and recognize such products by labeling them as Energy Star-certified. Following the enactment of the Energy Policy Act in 2005 by the U.S. Congress, the EPA and DOE were directed to promote Energy Star and implement a program that identified energy-efficient products and buildings.

In 2006, the Global Electronics Council debuted the Electronic Product Environmental Assessment Tool (EPEAT), which became an influential tool in green computing regulation. EPEAT acts as an online registry for identifying electronic products that meet specific environmental assessment criteria, including those addressing materials used, product longevity design and supply chain greenhouse gas emissions. 

Today, green computing standards and benchmarking metrics have been proposed by various organizations to help guide green computing initiatives. For example, the International Organization for Standardization (ISO) established ISO 14000 and ISO 50001, standards for environmental management systems and energy management systems.

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