Mainly by humans polluting atmosphere and by global warming we caused
Coral reefs begin to form when free-swimming coral larvae attach to submerged rocks. Both natural conditions and those created by man is what make coral reefs vulnerable to environmental stress.
Protect them from harmful exploitation by man.
Well, Coral Reefs are usually found in tropical waters (near the Tropic of Cancer). The water temperature in coral reef areas usually ranges in the 70s and 80sºF. But Reefs can also be man made by sinking ships and such, but they usually aren't coral reefs.
INCREASING OF HUMAN POPULATION GLOBAL WARMING WARMING OF THE OCEAN (rising of one degree in the ocean temperature can harm the corals) CLIMATIC CHANGE USING SODIUM CYANIDE FOR FISHING BOATS, OVERFISHING, WATER POLLUTION...
Dynamite fishing, coral hunting, pollution, and over-fishing just to name a few.
pollution, boat traffic, higher temperatures (caused by climate change - cause coral bleaching) and aggressive fishing.
Coral Reefs can be old upto a million years. Coral Reefs takes a long time to form so after its formed the Coral Reefs stand strong for a long time. Unfortunately due to people who break Coral Reefs they dont last for a pretty long time as it naturally should last.
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man-made: park,cities,aquarium etc. natural: volcano,ocean,coral reefs etc.
The biggest problem facing Coral Reefs is water pollution. The tiny animal that make up the reef, Coral Polyps, are extremely sensitive to changes in their environment. Man-made pollution can caused Coral 'die offs' that wipe out large areas of a reef in a short period of time. "Pollution" factors can include the raising of the water temperature surrounding the reef, as well as chemical pollution. Some sea animals do feed on Coral Polyps, but that effect is minimal and a part of the natural environment.
A reef is an aquatic hard-bottom community or habitat, with topographic relief. Reefs can be made of organisms (ie. coral or oysters), rocks, or man made structures.
no there are just helping them get better