Question
I have two maple trees, one green and one red. I have been getting a lot of Mushroom ? and some type of large fungas under both trees. are these harmful to the trees, pets or humans. these look as if they are growing on the roots that are close to the ground surface

Answer
There are many fungi that produce mushrooms in association with trees.  Based on your description, I cannot determine if the mushrooms are a problem or not.  If the tree appears to be suffering, it may be evidence of a wood decay organism.  Touching the mushrooms should not be harmful, but it is unknown if it would make you or your animals sick if they were consumed.  I would recommend removing them and throwing them away if you are concerned about consumption.  Some mushrooms release many spores when touched (ie. puffballs), so if you are bothered by mold allergies you may need to use some care.

In this factsheet, they explain some of the common mushrooms that cause wood decay of woody ornamentals.  Perhaps the mushrooms in your landscape are shown here:
http://www.ipm.ucdavis.edu/PMG/PESTNOTES/pn74109.html


If you would like to try to identify the mushroom, you may want to contact your local county extension office.  The locations of the offices can be found at this web site:
http://extension.osu.edu/locate-an-office

They may be able to help you identify the fungus or could forward it to someone else. Not all states will identify mushrooms because there is concern about misidentification and liability.  However, they may be able to narrow down the possible identities.  There are also many books on identifying mushrooms available at local libraries.  

Be sure to collect some of the mushrooms to take to the extension office if you decide to go this route.  It is also helpful if you can take digital images since the mushrooms often look different after they have been removed.

Good luck!