RUSSIA — Smoke from raging forest fires in Siberia has reached the north pole for the first time in recorded history, as a Russian monitoring institute warned the blazes were worsening. Devastating wildfires have ripped across Siberia with increasing regularity over the past few years, which Russia’s weather officials and environmentalists have linked to climate change and an underfunded forest service. …One of Siberia’s hardest-hit regions this year has been Yakutia – Russia’s largest and coldest region that sits atop permafrost – which has had record high temperatures and drought. …On Saturday, the US space agency Nasa said its satellite images showed wildfire smoke travelling “more than 3,000km (1,800 miles) from Yakutia to reach the north pole”, calling it “a first in recorded history”. It added that on 6 August most of Russia was covered in smoke.