0.029 g
cleaner than an estimated 96.4% of pages on the web
- A+
- A
- B
- C
- D
- E
- F
A+ is 0.04 g or less per view, F is more than 0.359 g CO₂e.
The numbers
- 0.038 g CO₂e
- <0.001 g CO₂e
- verified green
- 824 ms
- n/a
- 35 ms
At 10,000 views a month this page emits about 3.4 kg CO₂e a year, roughly 14 km in an average petrol car. The estimate assumes 75% new and 25% returning visitors, a measured cache reload ratio of 0%, and world-average grid intensity. How we calculate this
What to fix
apply everything → ~0.017 g/visit, rating A+
Audit third-party servicessave ~0.0070 g/visit (76 kB)Medium impact · moderate effort
7 third-party domains account for 153 kB (49% of the page).
Remove services that no longer earn their place; load the rest on interaction (facades for embeds, delayed consent-gated tags). Each third party is also a privacy and performance dependency.
- use.fontawesome.com88 kB
- use.typekit.net32 kB
- cdnjs.cloudflare.com28 kB
- scripts.withcabin.com2.0 kB
- cdn.jsdelivr.net1.9 kB
- p.typekit.net172 B
Lazy-load below-the-fold mediasave ~0.0051 g/visit (56 kB)Medium impact · quick fix
11 below-the-fold images/iframes (111 kB) download immediately for every visitor.
Add loading="lazy" to below-fold img and iframe elements (and keep it off the LCP image). Browsers then fetch them only when scrolling approaches.
- the-ethical-design-handbook.png26 kB
- world-wide-waste.png24 kB
- designing-for-sustainability.png21 kB
- SWD-Tom-Greenwood-Cover.jpg12 kB
- design-is-the-solution.png10.0 kB
Where the bytes are
- Images124 kB · 21 req
- Fonts106 kB · 3 req
- CSS35 kB · 9 req
- JavaScript35 kB · 6 req
- HTML14 kB · 1 req
Ten heaviest requests
| Resource | Type | Wire size | Cache-Control |
|---|---|---|---|
| use.fontawesome.com/releases/v5.8.2/webfonts/fa-solid-900.woff2 | font | 75 kB | max-age=31556926 |
| cdnjs.cloudflare.com/ajax/libs/jquery/3.4.1/jquery.min.js?ver=7.0.3 | script | 28 kB | no-transform, public, s-maxage=30672000, max-age=30672000, immutable |
| sustainablewebdesign.org/wp-content/uploads/2021/01/the-ethical-design-handbook.png | image | 26 kB | public, max-age=31536000 |
| sustainablewebdesign.org/wp-content/uploads/2021/01/world-wide-waste.png | image | 24 kB | public, max-age=31536000 |
| sustainablewebdesign.org/wp-content/uploads/2021/01/designing-for-sustainability.png | image | 21 kB | public, max-age=31536000 |
| use.typekit.net/af/fe099e/00000000000000003b9b40a5/27/l?primer=388f68b35a7cbf1ee3543172445c23e26935269fadd3b392a13ac7b2903677eb&fvd=n6&v=3 | font | 16 kB | public, max-age=31536000 |
| use.typekit.net/af/8ad6f2/00000000000000003b9b40aa/27/l?primer=388f68b35a7cbf1ee3543172445c23e26935269fadd3b392a13ac7b2903677eb&fvd=n4&v=3 | font | 16 kB | public, max-age=31536000 |
| sustainablewebdesign.org/ | document | 14 kB | public, max-age=0, s-maxage=86400 |
| use.fontawesome.com/releases/v5.8.2/css/all.css?ver=7.0.3 | stylesheet | 13 kB | max-age=31556926 |
| sustainablewebdesign.org/wp-content/uploads/2021/01/SWD-Tom-Greenwood-Cover.jpg | image | 12 kB | public, max-age=31536000 |
Share this report
<a href="https://carbonless.cc/report/sustainablewebdesign.org"><img src="https://carbonless.cc/api/badge?url=https%3A%2F%2Fsustainablewebdesign.org" alt="Carbon rating for this page" width="150" height="30" loading="lazy" /></a>The badge is a lightweight SVG (under 1 kB) served with long-lived caching, so a new scan can take up to a day to show through.