correcting climate change (Score 1)

If climate change trends toward warming and the Earths atmosphere becomes to hot for global ecology to continue could we possible try to correct the issue with a nuclear winter? I realize that using explosions that output allot of ionizing radiation would be absurd but what if we where to deliver particulate matter to the atmosphere another way? Perhaps an artificially induced impact winter via a redirected celestial body? It would be a measure of last resort but would such methods even have a slight chance of helping compensate for global warming?