To my knowledge this is the first time Warren Buffett has spoken of CO2. BRK's usual M.O. to date is to build windfarms, buy hydro, transport natural gas and reinsure property/casualty insurers. If you do a keyword search of the last five or ten annual reports you won't find "global warming", the only mention of "climate" is the business climate and of course commentary on hurricanes (or the lack thereof). Being a bit of a joker, Mr. Buffett was probably going for the play on words with "Greenhouse effect".
From the New York Times:
The Greenback Effect
IN nature, every action has consequences, a phenomenon called the butterfly effect. These consequences, moreover, are not necessarily proportional. For example, doubling the carbon dioxide we belch into the atmosphere may far more than double the subsequent problems for society. Realizing this, the world properly worries about greenhouse emissions.
The butterfly effect reaches into the financial world as well. Here, the United States is spewing a potentially damaging substance into our economy — greenback emissions.
To be sure, we’ve been doing this for a reason I resoundingly applaud. Last fall, our financial system stood on the brink of a collapse that threatened a depression. The crisis required our government to display wisdom, courage and decisiveness. Fortunately, the Federal Reserve and key economic officials in both the Bush and Obama administrations responded more than ably to the need.
They made mistakes, of course. How could it have been otherwise when supposedly indestructible pillars of our economic structure were tumbling all around them? A meltdown, though, was avoided, with a gusher of federal money playing an essential role in the rescue.
The United States economy is now out of the emergency room and appears to be on a slow path to recovery. But enormous dosages of monetary medicine continue to be administered and, before long, we will need to deal with their side effects. For now, most of those effects are invisible and could indeed remain latent for a long time. Still, their threat may be as ominous as that posed by the financial crisis itself.
To understand this threat, we need to look at where we stand historically. If we leave aside the war-impacted years of 1942 to 1946, the largest annual deficit the United States has incurred since 1920 was 6 percent of gross domestic product. This fiscal year, though, the deficit will rise to about 13 percent of G.D.P., more than twice the non-wartime record. In dollars, that equates to a staggering $1.8 trillion. Fiscally, we are in uncharted territory.
Because of this gigantic deficit, our country’s “net debt” (that is, the amount held publicly) is mushrooming. During this fiscal year, it will increase more than one percentage point per month, climbing to about 56 percent of G.D.P. from 41 percent. Admittedly, other countries, like Japan and Italy, have far higher ratios and no one can know the precise level of net debt to G.D.P. at which the United States will lose its reputation for financial integrity. But a few more years like this one and we will find out.An increase in federal debt can be financed in three ways: borrowing from foreigners, borrowing from our own citizens or, through a roundabout process, printing money. Let’s look at the prospects for each individually — and in combination....MORE