China yes, but India no.  Despite their massive population India produces only 6% of global GHG, or roughly 3 times what Canada produces with a much smaller population.

The thrust of the article is relevant, although I'm not sure the world faces a catastrophe as the author said.  Nor am I sure that temperature is rising as quickly as the models suggest.  But I am certain that adding more CO2 to the atmosphere will cause temperatures to increase.  That said, I'm definitely against a carbon tax as a means of reducing carbon emissions.  In order for the tax to be effective it would have to be much higher than $50/tonne.  (which translates into about 10 cents per liter of fuel)  Besides, no tax has ever improved productivity, which is our most pressing issue nowadays.   Better for government to tackle that problem.