Documents leaked by former National Security Agency (NSA) contractor Edward Snowden show the US monitored communications between key countries before and during the conference held in Denmark from December 7 to 18, 2009, the Guardian reported.
The monitoring was done to give US negotiators advance information about the positions of other countries at the high-profile meeting where leaders, including US President Barack Obama and former UK premier Gordon Brown, failed to agree on a deal on climate change.
"It was completely silly of them. First of all, they didn't get what they wanted. With all their hi-tech gizmos and all their snooping, ultimately the Basic countries (Brazil, South Africa, India and China) bailed Obama out. With all their snooping what did they get?"
Ramesh said he had no idea the US was spying on him. "I didn't get a sense that I was being followed. I didn't get a sense that my phones were tapped."
The NSA would keep US negotiators abreast of their rivals' positions, the leaked documents said.
