Prince Charles has warned that the financial crisis should not distract from the longer-term problem of the "climate crunch".
Speaking during a visit to Tokyo, the Prince of Wales said the global economy was "rightly a preoccupation of vast significance and importance".
"But we take our eye off the climate crunch at our peril," he added.
Prince Charles, along with his wife, the Duchess of Cornwall, is visiting Japan for the first time since 1970.
Their arrival was timed to coincide with the 150th anniversary of the establishment of diplomatic relations between Japan and Britain.
The trip is part of a wider tour of the Far East, which will also see the prince and the duchess travel to Brunei. Charles will later journey on to Indonesia alone.
The prince spoke on Tuesday after viewing exhibits related to global warming at Japan's National Museum of Emerging Science and Innovation.
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