Environmental web design & use tips:
* Wherever possible, choose text. Text is by far the most efficient (and as I like to illustrate, universal) medium.
* Make sure everything on your site has a good reason to be there. Avoid frameworks to further this.
* Compress your images & video.
* Especially avoid JavaScript, it adds significantly more processing effort to rendering.
* If you love something, download it. Buy it. Avoid advertising.
* Make sure HTML & CSS downloads fast.