Correct Answer : 14 billion
The United Nations Environment Programme (UNEP) and the International Energy Agency (IEA) have jointly released a report titled ‘Cooling Emissions and Policy Synthesis Report: Benefits of cooling efficiency and the Kigali Amendment’ report released July 17, 2020.
As per the report, the world will need more than 10 billion new cooling appliances by 2050, that will make the count of such machines to 14 billion. As per the report around 3.6 billion appliances are being used and it is increasing by up to 10 cooling appliances every second.