Claim: Thousands of coral atolls have "drowned" when unable to grow fast enough to survive at sea level.

Relevance (1 = gold evidence, 0 = mined hard negative): 1
Passage: "Islands disappear under rising seas".

Relevance (1 = gold evidence, 0 = mined hard negative): 1
Passage: More than 80 per cent of the country's land is composed of coral islands which rise less than one metre above sea level.

Relevance (1 = gold evidence, 0 = mined hard negative): 1
Passage: When the volcano sinks back down into the sea, the coral continues to grow, keeping the reef at or above water level.

Relevance (1 = gold evidence, 0 = mined hard negative): 1
Passage: The atolls have shown resilience to gradual sea-level rise, with atolls and reef islands being able to grow under current climate conditions by generating sufficient sand and coral debris that accumulates and gets dumped on the islands during cyclones.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: Atolls may also be formed by the sinking of the seabed or rising of the sea level.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: Habili – reef specific to the Red Sea; does not reach near enough to the surface to cause visible surf; may be a hazard to ships (from the Arabic for "unborn") Microatoll – community of species of corals; vertical growth limited by average tidal height; growth morphologies offer a low-resolution record of patterns of sea level change; fossilized remains can be dated using radioactive carbon dating and have been used to reconstruct Holocene sea levels Cays – small, low-elevation, sandy islands formed on the surface of coral reefs from eroded material that piles up, forming an area above sea level; can be stabilized by plants to become habitable; occur in tropical environments throughout the Pacific, Atlantic and Indian Oceans (including the Caribbean and on the Great Barrier Reef and Belize Barrier Reef), where they provide habitable and agricultural land Seamount or guyot – formed when a coral reef on a volcanic island subsides; tops of seamounts are rounded and guyots are flat; flat tops of guyots, or tablemounts, are due to erosion by waves, winds, and atmospheric processes Coral reef ecosystems contain distinct zones that host different kinds of habitats.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: Because of human overpopulation, coral reefs are dying around the world.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: "Coral islands defy sea-level rise over the past century: Records from a central Pacific atoll".

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: Coral reef systems have been in decline worldwide.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: The extinction rate of marine organisms was catastrophic.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: It resulted in the demise of the largest coral reefs in the Earth's history.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: Increasing sea temperatures in tropical regions (~1 degree C) the last century have caused major coral bleaching, death, and therefore shrinking coral populations since although they are able to adapt and acclimate, it is uncertain if this evolutionary process will happen quickly enough to prevent major reduction of their numbers.