Positive News Newsletters:

The Guardian – ‘The Upside’
https://www.theguardian.com/world/series/the-upside-weekly-report

New York Times
https://www.nytimes.com/newsletters/good-news

Shareable

Newsletter Archive / Sign Up 

Brain Pickings
https://mailchi.mp/brainpickings/

Open Culture
http://www.openculture.com/sign-up-for-open-cultures-free-daily-email

Web Sites

Ars Technica
https://arstechnica.com/

Treehugger
https://www.treehugger.com/

Yes Magazine

https://www.yesmagazine.org

Positive News
https://www.positive.news/

‘Viral’ Good News Sites

https://uproxx.com

https://www.upworthy.com

https://www.greatbigstory.com