Carbon dioxide has long drawn the ire of an environmentally-conscious humanity. Released from combustion of fossil fuels, levels of CO₂ in the atmosphere are higher now than at any point in the past 400,000 years. With the warming effects this has on the global environment, bringing these numbers down is a primary goal of scientists and policy makers worldwide.

However, this only tells part of the story. Carbon dioxide is not alone in its role as a greenhouse gas, with many others contributing significantly to global temperature rises. As humanity struggles to keep warming below 2 degrees C over the century, strategies will be needed to tackle the problem on all fronts.

THERE’S A BAD SMELL AROUND METHANE

Methane is a remarkably…