-Since no human is breathing anymore, the Carbon di-oxide cycle will be affected. -Most of the machines which were being used by humans won’t be running anymore thereby saving lots of trees and energy. -There will be a lot of accidents after a few seconds of death (for example: planes crash landing because pilot is dead, power stations will run out of fuel and it will become useless) -There will be a rise in the amount of Methane, Ammonia and Hydrogen sulfide in the atmosphere due to the gases emitted by the decaying bodies. -Insect and scavenger population will increase tremendously because they have a lot of food available now -Insects on your body will become extinct after a certain period of time. -Buildings and other man-made structures will wither away. -Due to the increase in oxygen availability (oxidation will become quite faster) and no maintenance of steel structures, all metal structures will be reduced to rust in a few hundred years. -Species whom we had almost reduced to extinction will restore their population. -Soil fertility would increase after a few years of human extinction. -Pet owners will have their pet dog sitting next to their corpse. -there will be no more pizzas -nature will restore itself to its (almost) original form.
Answer: while Duncan sleeps, she will give his chamberlains wine to make them drunk, and then she and Macbeth can slip in and murder Duncan. They will smear the blood of Duncan on the sleeping chamberlains to cast the guilt upon them.