co2science.org

https://co2science.org· First analyzed 11 May 2026· Updated 11 May 2026

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co2science.org

Mobile

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Hosting Provider

GoDaddy

godaddy.com

IP Address

72.167.59.125

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 Tempe, United States

ASN

AS26496

Organization

GoDaddy.com, LLC

Server

Apache

Nameservers

ns22.domaincontrol.com.ns21.domaincontrol.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

546 ms10%

Speed Index

710 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

209 KB

24 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

GoDaddy

Technology Stack

3 Technologies Detected

Payments

PayPal

Web Servers

Apache

Languages

PHPv7.4.33

SEO Analysis

D45/100

Meta Tags8/15

Content9/12

Headings0/8

Technical10/25

E-E-A-T0/7

Images1/7

Links5/5

URL5/5

Social0/5

Freshness0/4

Mobile4/4

Indexability3/3

co2science.orgco2science.org

CO2 Science

A weekly review and repository of scientific research findings pertaining to carbon dioxide and global change.

Title Length11 chars

Recommended: 50-60 chars (~68px / 580px)

Description Length110 chars

Recommended: 120-160 chars

Issues (3)

• Missing H1 tag — every page should have exactly one H1
• Most images missing alt text (15/15) — critical for accessibility and SEO
• Missing viewport meta tag — page may not be mobile-friendly (Google uses mobile-first indexing)

12 issues found

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Crawlability

Sitemap

Type: standard

8,486 URLs

robots.txt

3 rules

Sitemap reference found

Allows all crawlers

Local SEO

Local Search Readiness

0/100

Poor

15 2

This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

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AI & LLM Readiness

F31/100

Bot Access

20/25

Machine Read.

7/25

Schema Data

0/25

Citation

4/25

AI Bot Access

14/14 accessible

AI Search

OAI-SearchBot

PerplexityBot

Claude-SearchBot

Gemini-Deep-Research

DuckAssistBot

Training

GPTBot

ClaudeBot

Google-Extended

Meta-ExternalAgent

Bytespiderinfo

Amazonbot

Applebot-Extended

CCBotinfo

Fetch

ChatGPT-User

Machine Readability

llms.txt

llms-full.txt

Semantic HTML

Heading Hierarchy

Text ratio:9%

Words:349

Token eff.:Optimal

Structured Data

No Schema

Citation Readiness

Opening Summary11w

Descriptive Headings

Canonical URL

Open Graph0/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (12)

AI readiness recommendation preview...

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Accessibility

WCAG 2.1 Compliance

Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.

48/100

Passed

Critical

Warnings

Images & Alt Text

5/20

Checks if images have descriptive alt text for screen readers and visually impaired users.

Semantic Structure

3/20

Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.

Forms & Inputs

15/15

Verifies form fields have labels, error messages are clear, and inputs are properly associated.

Color & Contrast

15/15

Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.

Keyboard & Focus

9/15

Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).

ARIA & Roles

1/15

Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

4 recommendations

•Accessibility recommendation preview...

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Carbon Footprint

SWDM v4 · Eco-Score

Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.

57/100

A+

26 mg

CO₂e / view

208.6 KB

Page Weight

95%

Cleaner Than

New Visitor

30 mg

Returning (cached)

15 mg

Annual (10K/mo)

3.1 kg

Emission Segments

Data Center

6 mg

Network

6 mg

Device

14 mg

Resource Breakdown

Images

194.2 KB

CSS

7.5 KB

HTML

6.9 KB

Green Hosting Not Verified

GoDaddy

4 recommendations

•Carbon footprint recommendation preview...

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Security Score

0%Critical

Critical / Transactional

HTTPS

No WAF

175d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

GoDaddy.com, Inc.

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

Valid From

19.04.2026

Valid Until

03.11.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

co2science.orgwww.co2science.org

SHA-256 Fingerprint

B2:C2:5B:6D:E5:BD:A0:DB:87:F8:42:05:51:02:70:5D:25:66:4F:E7...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control

🔴 No Cache(no-store, no-cache, must-revalidate)

content-encoding

📦 Gzip(gzip)

content-length

6805

content-type

text/html; charset=UTF-8

date

Mon, 11 May 2026 15:44:53 GMT

expires

Thu, 19 Nov 1981 08:52:00 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (1)

mail.co2science.org

Domain Information

co2science.org

Domain Age

28y 1m

Created

18.04.1998

Expires

17.04.2027

Last Updated

17.04.2026

Registrar

GoDaddy.com, LLC

DNSSEC

Not Enabled

Mobile Compatibility

Viewport & Responsive Test

Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.

34/100

Not Mobile Friendly1 breakpoint

Viewport Meta

The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.

Responsive Design

Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.

Touch Icons

Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.

Readable Font Size

Base font size should be at least 16px on mobile to ensure text is readable without zooming.

Relative Units

Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.

No H-Scroll Risk

No elements wider than the viewport that would cause horizontal scrolling on mobile devices.

Tap Targets OK

Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.

No Fixed Widths

No elements with fixed pixel widths that could overflow on smaller screens and break the layout.

4 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Lucida Grande

WCAG Partial

50/100

Readability

/30

12/30

13px · LH --

Hierarchy

/20

10/20

WCAG

/25

14/25

1:1 min contrast

Performance

/25

14/25

1 font

Heading Font

Lucida Grande

Body Font

Lucida Grande

Sans13px

Contrast Ratio

1:1

25 issues

Reading Comfort

~96 CPL

Wide lines

13px

❌ Critical: 13px body text is too small. Minimum 14px, recommend 16px+.

⚠️ Wide lines: ~96 chars/line. Use max-width: 65ch for comfortable reading.

⚠️ Hard to read: Flesch score 31/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 25 elements below WCAG AA threshold (min 1.0:1).

✅ Lean font stack: 1 font families keeps load times fast.

⚠️ Missing font-display: swap — users may see invisible text while fonts load (FOIT).

Buy on MyFontsFlesch 31

Color Palette

10 unique colors

5.51:1 AA Light

#ffffff

Background· 58.5%

#6e685f

Other· 3.5%

#26353c

Primary· 8.5%

#16252a

Secondary· 4.9%

#405444

Secondary· 4.7%

#94b68c

Secondary· 3.8%

#cbd6c0

Secondary· 3.6%

Business & Marketing Stack

1 Tools Detected

Basic

Social Media

Twitter/X WidgetsFree

Social widgets and sharing tools

Sponsored

Scripts & Styles

2 Resources

Scripts

Styles

Async

Defer

Top Script Sources

Website Identity

co2science.org

28 years old

Location detected: 🇺🇸 United Statesvia ip

GoDaddy.com, LLC

Social Profiles

X (Twitter)

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Last analyzed: 11 May 2026 at 15:45

Historical Analysis & Change Tracking