Planting trees on 6.4 million hectares of northern taiga forest could remove 3.9 gigatons of CO2 by 2100 — five times ...

Canada’s tar sands have gained infamy for being one of the world’s most polluting sources of oil, thanks to the large amounts of energy and water use required for their extraction. A new study says ...

OTTAWA — An influential research article that claimed a popular weed-killer was safe has been retracted 25 years after it was published, prompting environment groups in Canada to ask the federal ...