Director / Editor: Victor Teboul, Ph.D.

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Independent and neutral with regard to all political and religious orientations, Tolerance.ca® aims to promote awareness of the major democratic principles on which tolerance is based.

January warm spells, March freezes: How plants manage the shift from winter to spring

By Richard B. Primack, Professor of Biology, Boston University

Trees and shrubs in cold-weather climates rely on certain signals, such as temperature and light, to know when to leaf out and bloom. Climate change is scrambling those signals.

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