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Officials urged caution ahead of the long weekend as thousands of residents in Western Canada and the Northwest Territories remained out of their homes due to wildfires.

A Canadian coal miner is facing legal action in an American court over levels of a contaminant from its mines in U.S. waters. Teck Coal Ltd.

WINNIPEG — The Manitoba government is promising more camping, better washrooms and other upgrades at provincial parks to address growing demand from people who want to enjoy the great outdoors. The 10-year, $121-million pledge includes 45 new yurts.

OTTAWA — Emissions from wildfires hit a new record in 2021 as the blazes that raged in Western Canada and Ontario produced more greenhouse gases than the oil and gas sector and heavy industry combined.

Dr. Alex Chee isn't letting his two toddlers play outside while wildfire smoke continues to pollute the air in Calgary. "It smells better than it did yesterday," Chee, a respirologist at the University of Calgary, said by phoneThursday.

New video and photographs purporting to show ivory-billed woodpeckers flying in a Louisiana forest were published by researchers on Thursday, as government officials said they will make a final decision this year on whether the birds are extinct .

NORTH WILDWOOD, N.J.

ALBUQUERQUE, N.M. (AP) — The U.S. government is greenlighting a proposed multibillion-dollar transmission line that would send primarily wind-generated electricity from the rural plains of New Mexico to big cities in the West.

WASHINGTON (AP) — Climate change 's hotter temperatures and society's diversion of water have been shrinking the world's lakes by trillions of gallons of water a year since the early 1990s, a new study finds.

WASHINGTON (AP) — The natural burst of El Nino warming that changes weather worldwide is far costlier with longer-lasting expenses than experts had thought, averaging trillions of dollars in damage, a new study found.