While householders today worry about the environmental damage committed by cars and wood-burning stoves, the air was filthier back in the 1950s, before air-pollution records were kept, when London smogs blotted out almost all light.
An FBI probe was launched Friday to determine the source of the leak, however a senior official told The New York Times that tracking down the perpetrator could prove difficult because a large number of officials have the security clearances needed to access the information.
The switch from coal-burning to gas, oil and electric heating in British homes has led to sulphur dioxide levels in the air falling by 98 per cent since 1970, and fewer soot particles no more than 2.5 micrometres in diameter by more than three-quarters.
Anton Gorelkin, a member of Russia's State Duma committee on information and communications, pointed Russians to services that would help them move videos from YouTube to the domestic equivalent, RuTube.
Russia flagship Moskva was blown up by Ukrainian missiles last April and sunk in the Black Sea, leading to deaths of hundreds of servicemen. It was seen as a huge coup for Ukraine, whose forces have been given a steady stream of accurate intelligence on Russia that has proved devastating for Putin's war effort
That comes despite the US spending $200 billion on advanced military hardware and spying equipment for Ukraine, with the cash credited for helping the country successfully hold-off Russian advances far longer than anyone thought necessary.
The regulator, Roskomnadzor, said adverts on the platform were calling for the communications systems of Russia and Belarus' railway networks to be suspended and that their dissemination was evidence of the U.S.
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"The 'guardians' of free speech have in all seriousness allowed users of their social media to wish death upon the Russian military," Medvedev, who served as president from 2008 to 2012 and is now deputy secretary of Russia's Security Council, wrote on the messaging app Telegram.
Former Russian President Dmitry Medvedev on Friday wrote a fierce criticism of foreign social media firms, mentioning by name both Meta and YouTube, but he hinted that the door leading to their possible return to the Russian market would be left ajar.
The documents - while up to several months old - offer detailed insights into which Russian intelligence agencies have been most compromised, and clues as to how the United States has gleaned so much secret Kremlin information.
Allied nations, such as South Korea, have also reportedly been the subject of spying by the Pentagon, raising questions as to the diplomatic impact the leak could have at a time of deteriorating global ties.
Intelligence agencies are believed to have comprehensively infiltrated Russia's military and its leading spy agencies, Online ESL PRE-K5 Grade Tutoring offering considerable knowledge of upcoming maneuvers, as well as insights into how badly Putin's war is going.
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March 18 (Reuters) - Russia on Friday demanded that Alphabet Inc's Google stop spreading what it called threats against Russian citizens on its YouTube video-sharing platform, a move that could presage an outright block of the service on Russian territory.
Outraged that Meta Platforms was allowing social media users in Ukraine to post messages such as "Death to the Russian invaders," Moscow blocked Instagram this week, having already stopped access to Facebook because of what it said were restrictions by the platform on Russian media.
While American officials have previously estimated Russian losses at about 200,000 soldiers, one of the reports indicated that there have been 189,500 to 223,000 casualties, including up to 43,000 killed in action.
Daniel Kebede (centre) has been outspoken on his political stances - including a statement after threats from Russian president Vladimir Putin against Ukraine where he criticised Nato involvement in the conflict