In-depth

Previous In-depths Landmark land settlement Carbon Conundrum Caribou in Canada The Mackenzie Delta Torngat Mountains Queen Charlotte Islands (Haida Gwaii) Travels with Louis British Columbia's Gulf Islands Moose on the loose Sustainable cities Icebergs Canada's musical landscape Quebec's James Bay Ottawa Valley Green with jade Hunting for cures Wild horses Canada's Bison Canada's place in the world Lessons learned in schools Power of powwows Cougars in Canada Greenland sharks Boreal birds Arctic grizzlies Lake Erie's Fire in the boreal forest Energy matters Parks for all Bighorn sheep Finding our way in the wilderness Shipwrecks of Nova Scotia Canada's grizzly bears

Image courtesy: Earth Sciences and Image Analysis, NASA - Johnson Space Centre. Mission: STS096; Roll: 701; Frame: 18

FEATURES Zebra mussels Zebra mussel DNA Point Pelee Port Stanley struggles Purify DEPARTMENTS • Knowledge Toolbox • Cartographer’s table • Just the facts • From the CG Vault

Cleaning the world’s beaches
Volunteers pick up trash along ocean and lake shores during the International Coastal Clean-up effort
Canadian Geographic, December 1991

Forment brewing on the Great Lakes
People living around the Great Lakes could be at risk from the accumulation of toxic chemicals
Canadian Geographic, December 1989/January 1990

Learning to live with zebra mussels
There’s little we can do about the zebra mussels that carpet the bottom of the Great Lakes
Canadian Geographic, May/June 1992

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