Skip to content
https://gsk.com

Sustainability

· 6 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.
SCORE
62
GRADE
D
FIX
2
REVIEW
1
PASS
3
INFO
0
Device:
Mobile Desktop
Checks
6
3 PASS 1 REVIEW 2 FIX
F
CO2 Per Page Load
Action
3.94g CO2 per view
FIX
3.94g CO2 per view
Critical::
3.94g CO2 per page view
This page transfers 16.7 MB, producing an estimated 3.94g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.10g, network 0.82g, end-user device 3.03g.
Got: 3.94g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 472.9 kg CO2/year
With 10,000 page views per month, this page would generate approximately 472.9 kg of CO2 annually — equivalent to charging 59116 smartphones.
Info::
Green hosting reduces data center emissions

3.94g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 5% of websites

Sustainable Web Design model v4 · Page size: 16.7 MB

Your site
3.94g
Top 10%
0.20g
Target
0.50g
Median website
0.60g

Energy Breakdown

Data center
0.10g
Network
0.82g
End-user device
3.03g
At 10,000 monthly views: Monthly: 39.4 kg · Annual: 472.9 kg · ≈ 59116 smartphone charges
F
Carbon Budget
Action
95th percentile
FIX
95th percentile
Warning::
3.94g CO2 — above the median website (0.60g)
Heavier than an estimated 5% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 95th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website

3.94g

95th percentile

Cleaner than 5% of websites

✗ Above the median website

vs Median 557% more
vs Target 688% more
B
Green Hosting
Green (hosting)
REVIEW
Green (hosting)
Info::
Google Cloud uses renewable energy
Info::
Google Cloud: Verified by the Green Web Foundation
Info::
Green hosting status based on known provider commitments
Green hosting detection uses a curated database of provider renewable energy commitments. This is not a real-time verification. For authoritative checks, visit thegreenwebfoundation.org.
Green Hosting✓ Green Hosted
Hosting Google Cloud✓CDN Not identified✗

Google Cloud: Verified by the Green Web Foundation

Based on known provider commitments. Verify at thegreenwebfoundation.org

A+
Repeat Visit Weight
99% cached
PASS
99% cached
Info::
99% reduction on repeat visits
Returning visitors download only 112 KB (vs 17050 KB first visit). 117 of 118 resources are served from browser cache, saving 3.92g CO2 per repeat visit.
Info::
Repeat visit: 0.03g CO2 (first visit: 3.94g)
First visit
17050 KB
Repeat visit
112 KB

99% reduction on repeat visits

Saving 3.92g CO2 per returning visitor

117 resources served from cache · 1 resources re-downloaded

A+
Transfer Efficiency
99% efficient
PASS
99% efficient
Info::
Transfer efficiency: 99%
Only 247 KB of potential savings identified. Your page is well-optimized for size.
99% efficient

Total waste: 247 KB (1% of page weight)

Unused JS 247 KB

0.06g unnecessary CO2 per visit

Actual transfer 17050 KB
Theoretical minimum 16803 KB
Potential savings 247 KB (0.06g CO2)

See Deep Analysis sections above for specific optimizations.

A+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Google Cloud

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

Send Feedback