Lightning is an important factor in carbon loss from forests, under climate change. It kills large trees and starts fires. Under climate change is expected to increase.
What geoengineering could be used to neutralise this risk?
Kill storms
Cloud seeding, MCB, etc. could reduce storm energy, reducing the capacity of lightning to form.
Directing lightning
There are various ways to disrupt lightning. Building aerial towers in forests will direct strikes. Wire-grounded rockets are already used, and drones or balloons could be used as an alternative. Potentially, artillery or mass drivers could be used, but the acceleration may tend to rip the wire off.