What threatens the health of coral reefs? (Select all that apply.) increased diversity of coral polyp species
ocean water pollution
damage to coral from diving, boating, and fishing tourism
silt in the water that runs off from coastal land development

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.

2%? i tried finding the exact sorry if it's not 100% correct ; -;

a symbiotic relationship with the mitochondria