Which of the following would be considered anthropogenic impacts on the natural environment? a. air pollution

b. introduction of invasive species

c. burning of fossil fuels

d. all of the above

You find a mysterious, dull substance on the ground and pick it up for a closer look. it is powdery, very light, and soft to the touch. the substance is most likely i. an organic mineral ii. a metallic mineral iii. a nonmetallic mineral i only ii only iii only i and ii i and iii