How many cells are present at the beginning of mitosis?

Landfills are waste disposal sites. they are often man-made depressions in the ground covered with a lining designed to prevent any leakage of waste materials. however, landfills can leak through the base resulting in negative impacts on the surrounding environments. what negative impact to the environment is caused by organic and inorganic constituents that are dissolved by rainfall in the landfills?

Idon’t know the answer and i’ve been stuck on it for a while now skskskskks

In each transformation of energy , some energy what?