Prince Charles gives speech at a meeting for for International Year of the Reef 2018

The speaker expresses gratitude to Justin and Kevin for their contributions and acknowledges the audience's efforts to attend the event. The event is deemed crucial as it addresses the often-overlooked impact of climate change on oceans and biodiversity, despite global focus on other environmental issues. The plight of coral reefs is highlighted as a significant concern.

What does the speaker mean by 'teaching grandmothers to suck eggs'?

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What challenges does the speaker highlight regarding coral reefs?

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