Argument: Sunshield costs are reasonable in face of global warming
"Solar shield could tackle global warming". Discovery. 7 Nov. 2006 - Angel estimates the cost at roughly $3 trillion, a sum that many would say is ludicrously beyond reach. He retorts that the bill is just one to two percent of the world's gross national product (GNP), which is surely a fair price when compared with the cost of global warming.
In 2001, for instance, the insurance giant Swiss Re, in a report commissioned by the United Nations, estimated that an increase in natural disasters as a result of global warming could cost the world over $300 billion annually by the year 2050.