Google is beginning to test a new AdSense feature "general category blocking," which'll allow you to block even more categories of ads from appearing on your site. "We're testing this feature with 170 more specific categories, including finance, travel, job, and automotive. This feature will allow publishers to block up to 50 ad categories from among a broad range of 170 fine grained categories. To help you understand potential changes to your earnings, we'll provide you with the percentage of your total revenue and total impressions that fall under each category," stated Google.
General category blocking will initially apply only to ads in English, regardless of the language of the site.
This feature is available in the new AdSense interface, which's currently in beta and being tested by a limited number of publishers.