The long term effects of mining include . A. Acid drainage b. Erosion c. Dust emissions d. All of the above Please select the best answer from the choices provided A B C D.

D

Explanation:

mining contributes to erosion, sinkholes, deforestation, loss of biodiversity, significant use of water resources, dammed rivers and ponded waters, wastewater disposal issues, acid mine drainage and contamination of soil, ground and surface water, all of which can lead to health issues.

 

The complex organic molecules are broken down by them to get energy. 

The individual components of these compex molecules are SET FREE in the environment ( air, soil , water ). 

Thus these are now FREE for recycling . 
example - A protein molecule is a very compex and big one with C,H,O, AND N in addition it may contain other atoms such a Fe , S as well ! It has some energy stored in it . 

When it is decomposed , all the individual elements mentioned above in capital letters are released for recycling . 

This is equally true for a dead tree .