To reduce fire risk and encourage growth of native trees, these palms are being airlifted out of San Diego canyon

Aiming to reduce wildfire risk and bolster native trees, conservation groups are using helicopters this week to remove 300 invasive palm trees from canyons in Tierrasanta.

Crews, with help from the city of San Diego, began cutting down the palm trees on Dec. 10. This week, they will move the trees…