According to LU's own figures, the company produces 585,000 tones of CO2 emissions per year. To offset that, you'd need to plant 26,000,000 trees.
Our bosses' solution to this? Encourage staff to recycle and turn out the lights.
Fine, we should all try our best not to be wasteful, but let's be honest here: those individual behavioural changes simply don't address the scale of the problem.
Our unions need to develop, and demand the company implements, comprehensive plans to reduce emissions, including by expanding schemes such as the one whereby waste heat from Northern Line tunnels is used to heat homes in Islington. Power supply workers and engineers should work together to develop a plan to source the electricity used to run our system from entirely renewable sources. All LU buildings should be fitted with the latest renewable and energy conservation technology.
Implementing a serious plan to reduce LU's carbon emissions requires investment. And securing that investment requires a concerted political fight, led by our unions, to restore the central government subsidy to TfL. In such a fight, we should demand that our Labour mayor - who talks a big game on climate change - should back us.