Are you willing to sacrifice the world's economy to slow down global warming?

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In a program Green Planet over NGC Asia, a scientist was featured with his invention, a solar shade made out of the thinnest and lightest lens in the world, to be deployed at a certain distance in a fixed orbit to act as a shade and regulate the amount of sun rays entering the planet. It might work if they deploy several hundred million pieces of it outerspace. The cost is also hundred trillions of dollars and according to NGC it will cause global economy to collapse. What do you think? Is this a worthed sacrifice to all mankind? Will this ever be realized.