Google will block more than 100,000 unique search terms that could lead to the discovery of child abuse images. The move follows UK government calls made earlier this year for search engines and Internet service providers (ISPs) to do more to prevent access to illegal material.
Microsoft is also preparing to announce its own efforts along with Google and other web firms and ISPs.
Warning Child abuse material is illegalIn a piece written for the Daily Mail, Google's executive chairman Eric Schmidt insisted his firm had listened to the government, and has added 200 people to its books dedicated to finding and removing images of child abuse.
Google, along with Microsoft's Bing search engine, had already been showing pop-up warnings and advice to users searching for illegal content. Schmidt said the warnings appear for 13,000 search queries on Google.