 However, on 4 January 2010, production was resumed.Later that year on 13 January 2010, Russian Federation President Vladimir Putin introduced changes in the legislation legalising the operation of the plant; this action brought about a wave of protests from ecologists and local residents.These changes were based on the determination President Putin made through a visual verification of Lake Baikal's condition from a miniature submarine, "I could see with my own eyes – and scientists can confirm – Baikal is in good condition and there is practically no pollution".