I'm from Italy and the Google Earth server seems inaccesible because of censorship. I've tried many free Web proxies without success. Can Tor help me to resolve the problem ?
In order to use Tor, the easiest way to download, install and run the Tor Browser Bundle. It is a customized Firefox browser that allows you to surf the web using Tor. So make sure you use the Web plugin of Google Earth, not the Desktop software, as the latter wouldn't be able to run on the Tor extensions provided by the browser.
If Tor is blocked by your ISP, you can use Pluggable Transports to be able to connect to the Tor network. It is an option that is now embedded in the Tor Browser, where you can specify when it first runs if you want to connect to the Tor network directly or using Tor bridges if access to Tor is blocked.