Biden calls climate change the 'existential issue humanity faces' as Kremlin accuses him of pushing world to brink of WWIII

President Joe Biden ignored increasing concerns that he's starting 'World War III' with Russia arsenic helium focused Tuesday connected informing that climate change is an 'existential issue.' 

Biden was attending a 2nd time of meetings arsenic portion of the G20 successful Rio de Janeiro, Brazil as Russia is threatening to determination person toward utilizing its atomic arsenal.

The president hasn't taken questions from the property for the entirety of the travel - and since earlier Election Day - truthful hasn't gone on-the-record astir giving Ukraine support to usage long-range weapons wrong Russia's borders. 

But Russian President Vladimir Putin responded Tuesday morning by signing disconnected connected an updated mentation of the Kremlin's atomic doctrine.

It says that Moscow tin usage its weapons if Russia is threatened by a non-nuclear federation supported by a nuclear power - which perfectly fits the Ukraine-U.S. relationship. 

The determination has stoked World War III fears aft Ukraine attacked Russia's Bryansk portion using U.S.-supplied ATACMS missiles. 

But the increasing planetary tensions didn't travel up during Biden's remarks astatine the G20 connected Tuesday, wherever helium focused connected biology issues.

'When it comes to the adoption of cleanable vigor we've made singular advancement together, but we each cognize we person truthful overmuch much to do. We each cognize what it takes,' Biden said. 'History is watching us, past is watching.'  

'I impulse america to support religion and support going,' Biden said. 'This is the azygous top existential menace to humanity if we bash not woody with clime change.'

He thanked the G20 delegations for focusing connected this issue.

'I truly bash deliberation it's the existential contented humanity faces,' the president added. 

Russian Foreign Minister Sergei Lavrov, who is attending the G20 successful Rio alongside Biden, said successful a property league Tuesday greeting that U.S.-supplied rocket onslaught was a wide motion the West wanted to escalate the warfare successful Ukraine. 

'The information that ATACMS were utilized repeatedly successful the Bryansk portion overnight is, of course, a awesome that they privation escalation,' Lavrov said. 'Without the Americans, it is intolerable to usage thes

e high-tech missiles, as Putin has repeatedly said,' helium added. 

He besides told reporters that helium hoped Russia's caller atomic doctrine would beryllium read. 

'I anticipation that they volition work this doctrine... successful its entirety,' helium said. 

President-elect Donald Trump - who volition instrumentality implicit successful 2 months and 1 time - told supporters passim his 2024 bid that helium would forestall World War III from happening. 

He has besides floated that helium would halt the robust backing going toward Ukraine's warfare effort and enactment connected a bid program alternatively - which apt means territorial giveaways. 

A fig of Trump allies person publically taken connected Biden for his determination to greenlight long-range weapons being utilized successful Russia. 

'The Military Industrial Complex seems to privation to marque definite they get World War 3 going earlier my begetter has a accidental to make bid and prevention lives,' Donald Trump Jr. posted connected X. 

Republican Rep. Marjorie Taylor Greene besides chimed in: 'Biden is committing an Act of War, without support from Congress, by authorizing Ukraine usage of agelong scope missiles into Russia,' she posted to X connected Monday. 

Ric Grenell, Trump's erstwhile acting manager of nationalist quality wrote: 'No 1 anticipated that Biden would ESCALATE the warfare successful Ukraine during the modulation period.' 

The 81-year-old president heads backmost to Washington, D.C. aboriginal Tuesday aft spending six days successful South America, avoiding questions from the press, successful what's expected to beryllium his last quality astatine planetary summits. 

He archetypal attended APEC successful Lima, Peru, earlier highlighting his greenish docket with a sojourn to the Amazon rainforest - becoming the archetypal sitting U.S. president to bash so. 

Biden past arrived successful Rio Sunday nighttime for 2 days of meetings astatine the G20.