; (3) the likely impact of sea level rise and extreme weather on public access points to and access along the coasts; and (4) Federal mechanisms for preventing the loss of access, for mitigating such loss when it occurs, and for increasing the quantity, quality, and affordability of public access to the coasts for both recreational and commercial activities. 1506. Study examining the impact of ocean acidification and other environmental stressors on estuarine environments (a) In general Not later than 90 days after the date of enactment of this Act, the Administrator shall make appropriate arrangements with the National Academies under which the National Academies shall conduct a study that— (1) examines the existing science of ocean acidification in coastal environments; (2) examines the challenges to studying ocean acidification and the combined effect of ocean acidification and other environment stressors in coastal environments; (3) provides recommendations for improving future research with respect to ocean acidification in coastal environments; and (4) identifies pathways for applying science in management and mitigation decisions relating to ocean acidification in coastal environments. (b) Contents of study The study conducted under subsection (a) shall include— (1) the behavior of the carbonate system within coastal environments; (2) the interactions of the carbonate system with other biotic and abiotic characteristics of coastal ecosystems; (3) how environmental and anthropogenic changes or disturbances, such as nutrient runoff and water pollution, could affect abiotic and biotic processes within coastal ecosystems; (4) how coastal biotic and abiotic processes will be affected under predicted environmental changes; (5) the current state of data collection, interpretation, storage, and retrieval and observational infrastructure of abiotic and biotic parameters in coastal ecosystems; (6) the gaps that exist in understanding the socio-economic and health impacts of ocean acidification in coastal ecosystems