>send the world back to the 1700's level of technology which while would save the planet That is a pretty strong claim you are making their. We have already mu

>send the world back to the 1700's level of technology which while would save the planet That is a pretty strong claim you are making their. We have already mucked up the carbon cycle be adding vast amounts of carbon into the system (carbon that took billions of years to get sequestered in the first place). This change alone would be sufficient to cause massive damage (and likely a mass extinction), and the 'only' way to fix it is to actively remove carbon from the environment and sequester it again. I put only in quotes because there may be ways we can prevent a lot of the damage by intervening at other stages of the process (for example, find a way to replace the functionality of species that are directly affected to prevent a cascade effect through the entire system).