In our environment dust particles would blow high into the atmosphere, that spread around the world and block out sunlight. Much of the dust would have remained in the atmosphere for months and this would keep our plants from photosynthesizing. With months of global refrigeration which causes the darkening of the Earth, the atmospheric dust would plunge on the Earth into a winter for several months. Delaying the greenhouse warming is a bolide that lands in the ocean and it would send it into the atmosphere not only the dust but also vast amount of water vapor which would remain in the atmosphere long after the dust settled out. Water vapor trapped in the atmosphere would intensify the solar heat that is absorbed in the atmosphere leading to greenhouse-like warming. This would bring the cold conditions to an end and plunge to the Earth into a period of extreme warmth.
Another problem is acid rain; it releases energy by impact that would cause oxygen and nitrogen to combine in the atmosphere to form oxides nitrogen. When these oxides of nitrogen come into contact, the water vapor in the atmosphere then it would make nitric acid. This would rain out as a form of acid rain.
Wildfires are another problem in which particles of soot have been found at the boundary horizon where the iridium occurs. This may be the remains of great fires that greatly spread across the globe when the hot meteorite hits the Earth. The cooling often seems to be the biggest problem at the line of the boundary. This is why some extinction of animals seems to have hit the hardest in certain organisms that were adapted to warm conditions. As for the plants, in certain higher parts of southern latitudes seem to have suffered the least amount than those in the northern part of higher latitudes.
An interesting outcome of the winter scenario is the concept of "nuclear winter". Scientists now contemplate that the effect of that of a nuclear explosion would have a great amount of impact on the environment. These explosions would, like the Cretaceous impact, cause huge amount of dust to be put into the atmosphere which would act as an air of dust and this would cause blockage of sunlight and cooling of our the Earth. This are only a few problems affect our environment.
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