In what sense of reintroduction of wolves to northern rocky mountains controversial?

a. wolves are too clever to be successfully tracked

b. wolves would probably frighten tourists

c. wolves would kill and eat livestock

d. wolves are not very efficient hunters

european union policies. the eu's long-term objective is to achieve levels of air quality that do not result in unacceptable impacts on, and risks to, human health and the environment. eu policies aim to reduce exposure to air pollution by reducing emissions and setting limits and target values for air quality.

the main environmental problems in western europe were: energy production/acid rain, nuclear power/waste, air pollution/climate, heavy metals, pesticides, water pollution, solid waste, and unforeseen accidents. many environmental problems are common to most european countries.

it enhances antibody production by t cells of the adaptive immune system.

hope i'm right

explanation: