4.7 sec in total
312 ms
3.7 sec
689 ms
Click here to check amazing CO2 Levels content. Otherwise, check out these important facts you probably never knew about co2levels.org
See how CO2 levels have never been higher with this fully interactive Atmospheric Carbon Dioxide (CO2) graph featuring current & historical CO2 levels and global temperatures. A project by the 2 Degre...
Visit co2levels.orgWe analyzed Co2levels.org page load time and found that the first response time was 312 ms and then it took 4.4 sec to load all DOM resources and completely render a web page. This is a poor result, as 65% of websites can load faster.
co2levels.org performance score
name
value
score
weighting
Value3.8 s
28/100
10%
Value15.5 s
0/100
25%
Value12.7 s
3/100
10%
Value4,950 ms
0/100
30%
Value0
100/100
15%
Value18.2 s
3/100
10%
312 ms
430 ms
315 ms
341 ms
322 ms
Our browser made a total of 71 requests to load all elements on the main page. We found that 52% of them (37 requests) were addressed to the original Co2levels.org, 13% (9 requests) were made to Climatelevels.org and 8% (6 requests) were made to Youtube.com. The less responsive or slowest element that took the longest time to load (1.2 sec) belongs to the original domain Co2levels.org.
Page size can be reduced by 471.5 kB (38%)
1.2 MB
762.8 kB
In fact, the total size of Co2levels.org main page is 1.2 MB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 80% of websites need less resources to load and that’s why Accessify’s recommendations for optimization and resource minification can be helpful for this project. Images take 496.7 kB which makes up the majority of the site volume.
Potential reduce by 24.9 kB
HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. This page needs HTML code to be minified as it can gain 6.4 kB, which is 20% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 24.9 kB or 77% of the original size.
Potential reduce by 80.0 kB
Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. Obviously, CO2 Levels needs image optimization as it can save up to 80.0 kB or 16% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.
Potential reduce by 52.5 kB
It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 52.5 kB or 18% of the original size.
Potential reduce by 314.1 kB
CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. Co2levels.org needs all CSS files to be minified and compressed as it can save up to 314.1 kB or 77% of the original size.
Number of requests can be reduced by 40 (63%)
63
23
The browser has sent 63 CSS, Javascripts, AJAX and image requests in order to completely render the main page of CO2 Levels. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 31 to 1 for JavaScripts and from 11 to 1 for CSS and as a result speed up the page load time.
co2levels.org
312 ms
www.co2levels.org
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purecookie.css
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purecookie.js
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bootstrap.min.css
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style.css
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conversion_async.js
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co2.php
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email-decode.min.js
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jquery-1.11.3.min.js
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co2levels.org accessibility score
Contrast
These are opportunities to improve the legibility of your content.
Impact
Issue
Background and foreground colors do not have a sufficient contrast ratio.
Navigation
These are opportunities to improve keyboard navigation in your application.
Impact
Issue
Heading elements are not in a sequentially-descending order
Names and labels
These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.
Impact
Issue
Image elements do not have [alt] attributes
Links do not have a discernible name
Best practices
These items highlight common accessibility best practices.
Impact
Issue
[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.
co2levels.org best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Includes front-end JavaScript libraries with known security vulnerabilities
Ensure CSP is effective against XSS attacks
User Experience
Impact
Issue
Displays images with incorrect aspect ratio
General
Impact
Issue
Detected JavaScript libraries
Page has valid source maps
co2levels.org SEO score
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Impact
Issue
Links are not crawlable
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Impact
Issue
Image elements do not have [alt] attributes
Mobile Friendly
Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).
Impact
Issue
Document uses legible font sizes
EN
EN
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Co2levels.org can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Co2levels.org main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.
co2levels.org
Open Graph data is detected on the main page of CO2 Levels. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: