The web has a weight problem

If the internet were a country, it would be thesixth most polluting nation on Earth. Data centers consume 11-19 million liters of water daily. And the problem is getting worse — median page weights increase every year while user experience barely improves.

The average web page is now over 2MB. A typical Squarespace site loads 20+ scripts, ships framework runtimes, and transfers megabytes of unoptimized images on every single page load. Multiply that by thousands of visitors and the energy cost is real.

Every North Blue Digital site targets under 500KB total transfer. Most pages come in well under that. The NBD site you're reading right now ships ~14KB of JavaScript total. Compare that to React (40KB+ gzipped) before your app code even loads.

Performance and sustainability are the same thing

This isn't a marketing angle — it's physics. Every optimization that makes your site faster also makes it lighter:

Fewer scripts = less energy

The entire interactive runtime (Datastar) is 14KB. A React app starts at 40KB+ before your code loads. Every unnecessary script is energy consumed on every page load for every visitor.

Optimized images = less data transfer

A single unoptimized hero image can be 2-3MB. Your site uses WebP/AVIF, proper srcset, and lazy loading. Your hero image should be 80KB, not 2.4MB — that's a 30x difference in energy per page load.

Edge caching = shorter distances

Cloudflare serves your site from the data center closest to each visitor. Less distance traveled = less energy consumed in transmission. Tom Greenwood calls this reducing "megabyte miles."

Server-side tracking = zero client waste

Google Tag Manager loads JavaScript in every visitor's browser. Zaraz does the same tracking server-side — zero client JavaScript, zero energy wasted on the user's device.

Static HTML = no server computation

WordPress generates every page on-demand from a database. NBD sites are pre-built static HTML — no server processing per request, no database queries, no wasted compute.

What does this actually look like?

Low-carbon websites aren't a compromise. Sites that emitas little as 0.024g CO2 per visitalso achieve the highest performance scores and best SEO rankings. Making websites leaner benefits your business and the planet.

Resilience is sustainability too

Not everyone has a $1,200 phone on 5G. The2026 Performance Inequality Gap reportshows that low-end Android devices are 9x slower than iPhones — and that gap hasn't budged since 2022. The 75th percentile connection is still just 9 Mbps over 4G. Meanwhile, the median web page has grown to 2.6MB.

Heavy websites exclude these users. A site that works on slow connections, older browsers, and cheaper devices isn't just sustainable — it's equitable. A page under 500KB instead of 2.6MB isn't just saving energy — it's making your business reachable by people the rest of the web is leaving behind.

Common questions

How do I measure my site's carbon footprint?

Use theWebsite Carbon Calculator— enter your URL and it estimates CO2 per page view based on data transfer, hosting energy source, and traffic. It's free and takes 10 seconds.

Does sustainability actually affect my business?

Yes, but indirectly. Lighter sites load faster, which means better Google rankings, lower bounce rates, and higher conversion. The sustainability benefit is a side effect of building sites correctly. For businesses with sustainability values, it's also a genuine brand alignment.

Is Cloudflare green?

Cloudflare has committed to powering their network with 100% renewable energy. Their edge network also reduces total data transfer by serving cached content from the nearest data center rather than routing every request back to an origin server.

Can you make my existing site more sustainable?

We can audit it and show you the biggest offenders — usually unoptimized images, unnecessary scripts, and client-side tracking. But if your site is built on WordPress or Squarespace, the platform itself has a weight floor you can't get below. A clean rebuild often achieves 50-98% reduction in data transfer.