The Pacific Islands face several environmental challenges, including the maritime effect, El Niño, and rising sea levels, while non-renewable resource depletion is not a highlighted challenge.
Maritime effect causing drastic temperature changes that harm agriculture, El Niño reducing fish availability, and causing severe weather, and rising sea levels due to climate change causing land to disappear are all environmental challenges facing the Pacific Islands. However, non-renewable resources being depleted is NOT an environmental challenge mentioned in relation to the Pacific Islands.
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