Since all these 'climate change cost' numbers are made-up, can't we just round them all to an even eleventy-zillion dollars?

Ghana needs $1.4 billion to fight climate change

afrol News, 13 August - Ghana would need over US $1.4 billion to combat climate change if bad environmental practices persists, a senior official of the West African country's Environmental Protection Agency (EPA) said.
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The Executive Director of the foundation said based on a 2006 study, Ghana would pay US $7.5 trillion by 2050 if it fails to address climate change.