She says the end result, a simple tree with oversized star silhouettes, could just as easily sit in London's White Cube Gallery as in her living room.

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Fast-forward several centuries, and a city was founded, then called Muang Sua, the result of two sages seeing a flame tree rising from the point where the rivers meet.

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But for some people, ingesting something that even accidentally touched tree nuts or peanuts could result in anaphylaxis, a severe reaction that can lead to blocked airways, cardiovascular collapse, and even death.

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Mr Simon believed that increased tree planting, entrepreneurial activity and cheaper substitutes would result in a decline in its value.

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