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Undersea forests, bleached and killed by rising ocean temperature, might disappear in a few decades, experts warn.

 Bleached coral in Guam in 2017. Photograph: David Burdick/AP

Children born today may be the last generation to see coral reefs in all their glory, according to a marine biologist who is coordinating efforts to monitor the decline of the world’s most colorful ecosystem.

Read more: Next generation ‘may never see the glory of coral reefs’

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3056693-poster-p-1-worldchanging-ideas-will-crispr-change-attitudes-about-genetically-engineered-food

It is imperative that we breed new varieties of plants to make agriculture more sustainable, given increasing food demand and a warming climate. Until recently, mutations and classical breeding techniques were sufficient to breed new varieties. At the end of the 20th century, tissue culture, gene transfer, and other molecular biologic developments entered the picture. In the past decade, a variation on mutation has emerged. We now see thousands of new plant varieties that were bread using artificial mutation with X or gamma rays or colchicine application. A mutation is a spontaneous or purposeful change in one of the genes of a living organism.

Read more: Countering the impact of climate change through new breeding techniques

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Many people are already facing the impacts of a changing climate and need help adjusting now, world leaders assert.

Read more: Bill Gates launches effort to help the world adapt to climate change

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