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Shock and awe — we are living it! We stand, mouth agape, staring at the pump — at $4 gallons and fast-emptying pocketbooks. Even worse, with crude oil already costing more than $120 a barrel, many predict this wave has yet to crest.

Most of the great problems we face are caused by politicians creating solutions to problems they created in the first place. Politicians and much of the public lose sight of the unavoidable fact that for every created benefit, there's also a created cost or, as Nobel Laureate Milton Friedman said, "There's no free lunch."

The world's biggest carbon offset market, the Kyoto Protocol's clean development mechanism (CDM), is run by the UN, administered by the World Bank, and is intended to reduce emissions by rewarding developing countries that invest in clean technologies. In fact, evidence is accumulating that it is increasing greenhouse gas emissions behind the guise of promoting sustainable development. The misguided mechanism is handing out billions of dollars to chemical, coal and oil corporations and the developers of destructive dams – in many cases for projects they would have built anyway.

The environmental movement has never been short on noble goals. Preserving wild spaces, cleaning up the oceans, protecting watersheds, neutralizing acid rain, saving endangered species — all laudable. But today, one ecological problem outweighs all others: global warming. Restoring the Everglades, protecting the Headwaters redwoods, or saving the Illinois mud turtle won't matter if climate change plunges the planet into chaos. It's high time for greens to unite around the urgent need to reduce emissions of greenhouse gases.

While no one knows who first uttered the sentiment "It’s better to say nothing and seem a fool than to open your mouth and remove all doubt," Republican presidential hopeful John McCain’s speech this week on climate change certainly supports the phrase’s validity.

McCain spoke at the facilities of Vestas Wind Technology, an Oregon-based firm that manufactures wind-power systems. The irony of the setting was rich given McCain’s outspoken opposition to pork-barrel spending.

Hurricanes and tropical storms will become less frequent by the end of the century as a result of climate change, US researchers have suggested.

During his 1999 bid for the Republican presidential nomination, the New York Times reported that John McCain told a group of college students that there was still a lot he didn't know about global warming. "I don't claim to be an expert on the issue," he said.