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.

When did the climate crisis begin?

By Jack Marley, Environment + Energy Editor, UK edition

How old is the climate crisis?

I was born in 1994, when the concentration of CO₂ in the atmosphere was measured at 360 parts per million; today it is close to 420. Furnaces, engines and former forests emitted 23 billion tonnes of this planet-warming gas in 1994; today they spew more than 37 billion tonnes. With some exceptions (economic downturns, the pandemic), humanity has released more CO₂ into the atmosphere each…

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