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Each hectare of trees releases, as vapour, almost 190,000 litres of water a year.

This water passes into the atmosphere to be transported around the entire globe.

That means the heart of the world's weather lies in tropical forests.

Unfortunately, there's an almost insatiable demand in Europe and China for hardwood from these very forests.

And that is having an enormous impact.

As more tropical forest is felled, some scientists are seeing a correlation with changing storm patterns across Europe and America.

And it's likely to become more extreme.

Staggeringly, 50% of the Congo Basin forest has been allocated for logging.

The future of Africa's forest has never been more critical for us all.

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