Which of the following negative impacts of mining involves rainwater seeping through piles of overburden, creating sulfuric acid?
acid mine drainage
land subsidence air and water pollution
scarring of surface land

Plz plz plz quick! 49 points for whoever which of the following statements about greenhouse effect is true? *life on earth is suffering because of greenhouse effect *the greenhouse effect is caused by human activity *all greenhouse gases are harmful *life on earth would not exist without the greenhouse effect

Asmall number of finches are removed randomly from the wild and placed in a protected bird area. they are given as much food as they need and have plenty of space. why would natural selection not occur in this population? a. there is no reason for genetic mutation to occur. b. the birds compete for limited resources, c. the population has not reached carrying capacity. d. there is no genetic variation in the finches.

Which conditions need to be in balance for cells to function? check all that apply. blood sugar food intake body water body temperature body mass