It is either a Ï bond or a lone pair on an atom of relatively high electron density in a molecule or ion, or a bond that must break during a reaction. An electron sink is an atom on a molecule or ion that can accept a new bond or lone pair of electrons.
Threats to the Reef. The Great Barrier Reef is one of the worldâs best managed reefs but, like other coral reefs, it faces threats such as: 1  Climate change. 2  Extreme weather.3  Declining water quality. 4  Coastal development. 5  Illegal fishing. 6  Crown-of-thorns starfish outbreaks. 7  Marine Debris.hreats to the Reef. The Great Barrier Reef is one of the worldâs best managed reefs but, like other coral reefs, it faces threats such as: 1  Climate change. 2  Extreme weather. 3  Declining water quality. 4  Coastal development. 5  Illegal fishing. 6  Crown-of-thorns starfish outbreaks.
UNESCO first threatened to list the Great Barrier Reef as a World Heritage site in danger in a highly anticipated report released in June 2012.The report into the management of the reef said the Federal Government needed to implement a strategic assessment before considering future developments around the reef.NESCO first threatened to list the Great Barrier Reef as a World Heritage site in danger in a highly anticipated report released in June 2012. The report into the management of the reef said the Federal Government needed to implement a strategic assessment before considering future developments around the reef.