Air pollution in us national parks is effecting the environment in what way(s)? a. plant damage from ozone exposure b. high levels of mercury found in endangered bat species c. changes to alpine ecosystems due to nitrogen d. all of the above

Option D, all of the above, is the right answer.

The increase in the temperatures and more vulnerability of chemicals adds to all the given options. For instance, the direct effect of air pollution can be seen on the plants and the damaged caused to the plants and forests will adversely affect the ecosystem. The high amount of  Mercury observed in the species of bats can also affect the environment as a great number of substances and poisons being stirred into the ozone zone. Moreover, the variations in the alpine ecosystem are caused by the changes in the chemical emission in the air that gets mixed with the oxygen. Thus, option D is the right  answer.

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