You do not need to learn how to edit Wikipedia to participate in the 100 Days 100 Edits Campaign (see Join the campaign for more information). But if you'd like to, here's some information:

How to edit

You'll want to start by creating a Wikipedia account, if you don't have one already.

Tutorials for the basics

There are helpful set-by-step instructions here. Don't worry about the source editor tutorial - the visual editor is the easiest way to start editing!
There are also great training modules for the basics on Wikipedia's Outreach Dashboard.
The Wiki Show on YouTube has a series of videos on Wikipedia basics.

Sources & citations

Information should be added to Wikipedia in your own words and the source cited with reliable secondary sources. Wikipedia is very discerning when it comes to the quality of sources cited. Reports from major scientific organisations or international bodies, textbooks and review articles in scientific journals are all suitable. WikiProject Climate Change also has a list of recommeded sources.

This PDF shows you how to add a citation.

Talk pages

Talk pages are spaces for Wikipedia editors to collaborate on editing. Every article has its own talk page. You can find out more about talk pages and how to use them here.

Images

Want to add your own images to Wikipedia? Start by uploading them to Wikimedia Commons. You can then add this image, or choose from other images on Commons, to add to a Wikipedia article.

Here's a YouTube video of how to do this. This PDF also explains everything.

Remember, all media uploaded to Commons must be licensed under a Creative Commons license (e.g.:CC-BY4.0), meaning that the image not copywrited and is free to use.

Help!

Reach out to User:TatjanaClimate for help with anything! You can also ask your editing questions at the Teahouse. For Climate Change -specific editing questions, head to the Talk page of WikiProject Climate Change.