University College London - 10007784ACTIVE

Replaced Institute of Education, University of London, School of Pharmacy University of London(The).

Emissions

  • URL: https://www.ucl.ac.uk/

    Time to load: 0.9 seconds

    2022 2023CO2 / grams05101 June 2021: 10.15 grams of CO230 June 2021: 9.73 grams of CO229 July 2021: 9.45 grams of CO21 September 2021: 10.10 grams of CO26 October 2021: 10.19 grams of CO23 November 2021: 8.81 grams of CO21 February 2022: 10.46 grams of CO212 April 2022: 7.20 grams of CO29 June 2022: 9.35 grams of CO26 September 2022: 10.09 grams of CO27 December 2023: 1.00 grams of CO2
    Note: from 1st November 2022 we adopted version 3 of the methodology for estimating CO2 emissions. This will tend to lower CO2 estimates for a given size.
    Date checkedCO2 / gramsPage sizeEnergy
    2023-12-071.004.6MBGREEN
    2022-09-0610.0918.5MBGREEN
    2022-06-099.3517.1MBGREEN
    2022-04-127.2013.2MBGREEN
    2022-02-0110.4619.1MBGREEN
    2021-11-038.8116.1MBGREEN
    2021-10-0610.1918.7MBGREEN
    2021-09-0110.1018.5MBGREEN
    2021-07-299.4517.3MBGREEN
    2021-06-309.7317.8MBGREEN
    2021-06-0110.1518.6MBGREEN

    Tip: Optimise images

    We estimate potential to save at least 539kB* by optimising images:

    1. homepage-bannerv2_0.... is 1.0MB
    2. 404298761_3179784677... is 442kB
    3. charles-summerschool... is 362kB and could be 234kB smaller
    4. disabledandhere-t02.... is 289kB and could be 167kB smaller
    5. prx_figure_cropped.p... is 237kB
    6. studentseventsactivi... is 182kB and could be 28kB smaller
    7. 407485815_1272753393... is 155kB
    8. ucl-portico-side-psw... is 117kB and could be 41kB smaller
    9. video-ucl-societies.... is 92kB and could be 24kB smaller
    10. bravethinkers-still-... is 70kB and could be 11kB smaller
    11. ucl_minds_1060_5971_... is 66kB and could be 22kB smaller
    12. helenczerski-7-credi... is 43kB and could be 9.4kB smaller
    13. chia-jung-tsay-poets... is 30kB and could be 4.3kB smaller

    First, check that images are appropriately sized - you most likely don't need a 6000x4000 pixel image straight from a digital camera. In Windows, the Photos software will let you quickly shrink huge images and will give you an improvement.

    Next you could try using tinyjpg.com (JPG image) or tinypng.com (PNG image) to further optimise your image. This will strip out metadata that may be taking up lots of space.

    *This is an estimate from Google PageSpeed and you may get much better results than this in practice.

    Tip: Large files

    Aside from images, here are the biggest resources:

    1. all.js is 520kB
    2. widget_iframe.d37472b4a6622d0b... is 106kB

    Tip: Limit third-party code

    Here are the largest sources of third-party code:

    1. Cloudflare CDN uses 94kB
    2. FontAwesome CDN uses 520kB
    3. Twitter uses 135kB
    4. Instagram uses 695kB
    5. Facebook uses 93kB
    6. Google CDN uses 34kB

    Third-party code can significantly impact load performance. Limit the number of redundant third-party providers and try to load third-party code after your page has primarily finished loading.

    If you use the Twitter widget to load a timeline it may be loading as many as 100 of your recent tweets which may contain lots of images. Try setting 'data-tweet-limit' to the most recent 3.

    Screenshot