The BBC's environment analyst, Roger Harrabin, reports on the dangers facing some of the planet's most spectacular underwater environments.
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See all broadcasts of Back From the Front (7)
The BBC's Vladimir Hernandez on Venezuela's failure to get food on people's tables.
The house where the Philippines' forgotten 'comfort women' were held.
Read more from disability correspondent Nikki Fox.
The Ganges is one of the greatest rivers on Earth, but it is slowly being poisoned.
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