It's important to understand that if we completely shut off CO2 production today, the climate would continue to warm significantly for decades/centuries into the future. And that warming might not be completely catastrophic, and could even seem positive in some ways to a minority of world citizens. The 350ppm of 350.org is still way above pre-industrial levels, but is seen by most as safe.
However, that's no longer what anyone is arguing about. What is argued about is the continued effect of dumping 40 billion tons of CO2 into the atmosphere year after year after year with no end in sight, while we're already over 400ppm. Any arguable positive effect, we've already achieved - it's the 4-5C of warming we're currently on track for that scientists claim, with good reason, will be catastrophic for human civilization and the present state of life on earth.
However, that's no longer what anyone is arguing about. What is argued about is the continued effect of dumping 40 billion tons of CO2 into the atmosphere year after year after year with no end in sight, while we're already over 400ppm. Any arguable positive effect, we've already achieved - it's the 4-5C of warming we're currently on track for that scientists claim, with good reason, will be catastrophic for human civilization and the present state of life on earth.