Canadian lakes are in hot water over climate change, a new research survey has concluded. "Canadian lakes are warming twice as fast as the rest of the lakes globally," said York University biologist Sapna Sharma, a co-author of a paper published in the journal Bioscience. Sharma and her colleagues pored over 143 studies from around the world to try to summarize how climate change is affecting the globe's 100 million lakes. Lakes that have been ice-covered at least part of the year are experiencing the biggest changes, they found.