Google has been warned by US Congress to take better action against copyright infringement, or government will be forced to step in.

Speaking at a DMCA hearing last month, Rep. Tom Marino (R) Pennsylvania criticised the search engine on displaying links to illegal content and asked for a ratings system that makes users aware of copyright infringing sites.

Katherine Oyama, senior copyright policy counsel at Google, said the key is to “increase the availability of legitimate offerings”.

“We always want ...