What is the mechanism of the film The Day After Tomorrow?

Greenhouse effect is not only equal to climate warming, at the same time, gases that cause greenhouse effect, such as carbon dioxide, water vapor and CH4, absorb thermal radiation, leading to temperature drop. El Nino and La Nina occur very frequently, causing glaciers to melt. On the one hand, it reduces the salt concentration of seawater and makes the heat carried by warm current insufficient. On the other hand, the sea level rises and the surface floods. The greenhouse effect promotes the global temperature rise, which will inevitably lead to the extreme prosperity of plant growth, especially the massive reproduction of marine plants such as seaweed. Because the photosynthesis of plants will have a sharp impact on the environment, and because greenhouse gases are consumed by a large number of breeding plants, the temperature will eventually drop.