Osama bin Laden’s message of worry about climate change and devastating Pakistan flooding, broadcast online yesterday, aims to polish his battered image among Muslims, a leading Western analyst said.

“Bin Laden seeks to capitalise on any crises or problems which are of concern to the people whose favour and support he seeks,” said Paul Pillar, a former top US intelligence official who retired in 2005 after a 28-year career.

“At least for many Pakistanis, the floods have most recently been concern number one,” said Mr Pillar, a professor at Georgetown University, adding that the Al-Qaeda chief “projects a compassionate image” by focusing on social issues.

He aims “to counteract his loss of support among people who have come to perceive him as an uncaring terrorist who has no hesitation about spilling the blood even of fellow Muslims,” Mr Pillar said by e-mail.

Some US officials have taken pains to highlight the number of Muslims killed by Al-Qaeda and its offshoots in a bid to sap support for the network behind the September 11, 2001 attacks on the United States.

And bin Laden, whose latest message avoided direct calls for violence, may also be taking note that militant groups like Hamas and Hizbollah win public support by providing services, said Mr Pillar.

“If he can’t build goodwill by actually providing services like those groups do, he can at least hope to get some mileage out of talking up the subject,” the analyst added.

Mr Pillar’s comments came after a monitoring group provided what it described as an audio message from bin Laden in which the Al-Qaeda chief warned that the number of victims from climate change is “bigger than the victims of wars”.

The voice on the message also urged “serious and prompt action to provide relief” to those afflicted by Pakistan’s devastating floods, the country’s worst environmental disaster.

If authenticated, the tape provided by SITE Intelligence Group would be the first time bin Laden has spoken publicly since March 25.

The recording’s focus on Pakistan was notable in that Al-Qaeda number two Ayman al-Zawahiri and US-born Al-Qaeda spokesman Adam Gadahn both assailed the US ally’s response to the catastrophe in recent messages.

US intelligence agencies declined to comment, but a US official who requested anonymity called the Pakistan appeal “yet another cynical ploy by someone who is, in fact, one of mankind’s least humanitarian people.”

But Michael Scheuer, formerly the CIA’s top bin Laden tracker, warned against seeing climate change – and notably calls for preventive steps to mitigate flooding – as a new or bizarre theme for the world’s most hunted man.

“This not just some ham-head with an AK-47,” Mr Scheuer said, condemning the “one-dimensional picture” many in the West paint of bin Laden. “We tend to forget he was trained as a construction engineer, he’s a management expert, and when he was in the Sudan, he was extensively involved in agricultural issues,” he added.