The middle of a group of three proximate SPB bridges spans the
quietest of the roads.
In past decades high, feathery cirrus clouds were less common during
summer months. The amount of cirrus has increased with the number of
jet flights. While airplanes were grounded for a few days post 9-11,
the quantity of cirrus diminished, and US temperatures temporarily
fell back to near their pre-global-warming levels.
Similar happened during March and April 2020 when the covid-19 outbreak
greatly dimished travel by air. Global temperatures both months were
only a small amount warmer than their 30-year normals, and a smaller
amount warmer than the preceding months had been. This suggests aircraft
aerosols contribute more to climate change than does CO2. The easy
short-term solution is for planes to fly at lower altitudes.
Per the NASA study linked below, "This result shows the increased
cirrus coverage, attributable to air traffic, could account for nearly
all of the warming observed over the United States for nearly 20 years
starting in 1975..."
NASA links warming to jet flights