Photo: ADRIAN DENNIS/AFP (Getty Images) As the largest greenhouse-gas emitting sector in the U.S., the transportation system must be overhauled in order to avoid the worst effects of climate change. That means presumptive Department of Transportation Secretary Pete Buttigieg has a big task ahead of him. Advertisement But he won’t be alone in this task; President Biden is committing to center climate in his approach to governance, including other federal agencies. Problems facing our transportation system already will likely be compounded by the budget crisis facing public transit agencies due to the pandemic-driven drop in ridership. Democratic control of the House and Senate make it likely