Which degree of decreasing are you talking about ?
The most dramatic change would be massive chaos to the Earths climate.
the acceleration decreases
The temperature would be different on Earth.
it would become to cold
we would die
The length of the day
If supply of a commodity decreases, the supply will fall. Prices and supply of good have positive relationship.
we would only have one season
No, that would be a lunar eclipse.
youll die
This varies on what climate is being discussed here. If there is climate on Mercury that is similar to that of Earth, temperatures would arise.
In the short run, there would be oversupply.