— In a 1,500-word memo obtained by The New York Times over the weekend, the company’s top lobbyist, Nick Clegg, sought to rebut Haugen’s allegations ahead of her unveiling in an episode of “60 Minutes” on Sunday night. “Social media has had a big impact on society in recent years, and Facebook is often a place where much of this debate plays out,” he said in the memo, in which he called Haugen’s impending accusations, which included blaming Facebook for January’s insurrection at the Capitol, “misleading.” He wrote that “what evidence there is simply does not support the idea that Facebook, or social media more generally, is the primary cause of polarization.”
The billionaire entrepreneur said: “We are concerned about rapidly increasing use of fossil fuel for Bitcoin mining and transactions, especially coal, which has the worst emissions of any fuel.”

The plunge occurred at 7:34 a.m. New York time, according to the Binance.US website. Volume on the exchange in that minute was 592.8 Bitcoin, which are worth just shy of $40 million at current prevailing prices.
Cryptocurrency markets are decentralised, which means they are not issued or backed by a central authority such as a government. Instead, they run across a network of computers. However, cryptocurrencies can be bought and sold via exchanges and stored in ‘wallets’ .