The climate crisis is our third world war

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When the US was attacked during the second world war no one asked, “Can we afford to fight the war?” It was an existential matter. We could not afford not to fight it. The same goes for the climate crisis. 
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The war on the climate emergency, if correctly waged, would actually be good for the economy – just as the second world war set the stage for America’s golden economic era , with the fastest rate of growth in its history amidst shared prosperity. The Green New Deal would stimulate demand, ensuring that all available resources were used; and the transition to the green economy would likely usher in a new boom.
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Almost surely, however, there will have to be a redeployment of resources to fight this war just as with the second world war, when bringing women into the labor force expanded productive capacity but it did not suffice.
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There is absolutely no reason the innovative and green economy of the 21st century has to follow the economic and social models of the 20th-century manufacturing economy based on fossil fuels, just as there was no reason that that economy had to follow the economic and social models of the agrarian and rural economies of earlier centuries.

Joseph E Stiglitz