I'm interested in Bill McKibben's ongoing work and activism. Please navigate to the 'articles' section of his website and identify the title and publication date of his most recent article listed. Additionally, find out what 350.org is and Bill McKibben's role in it, as described on his site.
Navigate to 'billmckibben.com'. Click on the 'articles' link (ID 14). Identify the title and publication date of the most recent article listed. Navigate back to the homepage (if necessary, or locate information about 350.org from the current page). Locate and extract information describing what 350.org is and Bill McKibben's role in it. Synthesize the gathered information into a concise answer.
The agent successfully navigates to the 'articles' page. The agent identifies the title and publication date of the most recent article. The agent successfully identifies what 350.org is (e.g., 'an international climate campaign'). The agent identifies Bill McKibben's role in 350.org (e.g., 'co-founder').