Crews have been ramping up wildfire resilience projects to thin out brush and dead wood in California's giant sequoia groves, clearing twice as many acres in 2023 compared with 2022. The Giant Sequoia Lands Coalition is trying to avoid a repeat of the disastrous mega-fires of 2020 and 2021 - which killed about 20% of large mature trees in their native Sierra Nevada range. Joanna Nelson, Ph.D. ...