The Canadian Press Some of the most active companies traded Tuesday on the Toronto Stock Exchange:Toronto Stock Exchange (16,188.10, down 63.27 points).Aurora Cannabis Inc. (TSX:ACB). Health care. Down four cents, or 0.3 per cent, to $13.22 on 21.8 million shares.The Green Organic Dutchman Holdings. (TSX:TGOD). Health care. Up 38 cents, or 7.45 per cent, to $5.48 on 17.7 million shares.Hexo Corp. (TSX:HEXO). Health care. Up 29 cents, or 3.25 per cent, to $9.20 on 10.5 million shares.Canadian Natural Resources Ltd. (TSX:CNQ). Energy. Down 45 cents, or 1.2 per cent, to $36.94 on 8.2 million shares.Encana Corp. (TSX:ECA). Energy. Down 24 cents, or 2.39 per cent, to $9.79 on 6.6 million shares.Aphria Inc. (TSX:APHA). Health care. Up six cents, or 0.44 per cent, to $13.71 on 6.4 million shares.Companies reporting:Air Canada (TSX:AC). Up 33 cents to $31.75. Air Canada has decided to remove its grounded Boeing 737 Max 8 jets from service until at least July 1 in order to provide more certainty for passengers that wish to book flights in the coming months. Canada’s largest airline announced Tuesday that it has substituted different aircraft in its fleet, chartered flights or leased aircraft from Air Transat, suspended some routes temporarily, and adjusted its rebooking policy for affected customers.