In four decades of climate negotiations, the world has focused intensely and exclusively on the most abundant climate-warming gas: carbon dioxide.
The plea could cause consternation in countries opting for natural gas as a cleaner alternative to CO2-belching coal. It also could pose challenges for countries where agriculture and livestock, especially cattle, are important industries.
Today’s average global temperature is already 1.1C higher than the preindustrial average, thanks to emissions pumped into the air since the mid-1800s. But the world would have seen an additional 0.5C of warming, had skies not been filled with pollution reflecting some of the sun’s radiation back out into space, the report says.
On a global scale, methane emissions are responsible for around 30% of warming since the pre-industrial era, according to the United Nations. The report sends a loud signal to countries that produce and consume oil and gas that they need to incorporate “aggressive oil and gas methane reduction plans into their own climate strategies,” said Mark Brownstein, senior vice president of energy at Environmental Defense Fund.
“ leakage from gas and also oil wells is very difficult to quantify,” he said. If countries are not looking, they will not find it.
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