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L.A.’s first ‘tree officer’ is trying to plant 90,000 trees by 2021

This story was originally published by Mother Jones and is reproduced here as part of the Climate Desk collaboration.

Los Angeles, the sprawling city of freeways, thinks its future depends on trees. And it may be right: Research shows trees improve air and water quality, store carbon, and can even reduce stress. All these benefits don’t seem to be lost on Mayor Eric Garcetti, who in late April announced his version of a Green New Deal for the city. Among other measures, he mandated that every new city-owned building be all-electric, established a goal to phase out styrofoam, called for a 50 percent reduction in greenhouse gas emissions by 2025, and, crucially, tasked the city with the goal of planting a whopping 90,000 trees by the end of 2021. “With flames on our hillsides and floods in our streets,” Garcetti said in a press release at the time, “cities cannot wait another moment to confront the climate crisis with everything we’ve got.”

The ambitious tree-planting project falls under the purview of Rachel Malarich, the city’s forest officer — a job that was just created in August to “oversee the growth of Los Angeles’ urban forest” as part of Garcetti’s Green New Deal. An arborist with more than a decade of experience in urban forestry, Malarich was appointed just days before the United Nations’ Intergovernmental Panel on Climate Change released a report that emphasized the role of trees and forests in combatting climate change. The project will grow what’s already the largest urban forest in the country, making what happens in Los Angeles an important model for other cities looking to go green.

A real tree nerd myself, I called Malarich last month, when she was just a few weeks into the job, to chat about the unnoticed benefits of urban foliage, which species is her favorite, and the challenges of actually planting tens of thousands of trees in just a few years. Below is an edited and condensed version of our conversation.

Q. In my mind, your day-to-day looks something along the lines of Leslie Knope’s job from Parks and Rec. What kinds of things do you deal with now or do you expect to deal with?

A. I don’t think I’m down into a routine yet. In this initial time, I’m meeting key stakeholders, including heads of departments and council offices and kind of doing the rounds of doing introductions. I’m also doing some background research. But I don’t know yet, honestly [laughs].I’m still finding out where to get paper and pens.

Q. I’m trying to wrap my head around this goal of 90,000 new trees by 2021. It would require planting, on average, almost 100 trees per day [beginning in April 2019]. How is that going to be possible?

A. Well, now you’ve discovered the secret of what I’m doing with my time; I’m out there with a shovel — no I’m kidding [laughs]. The truth is, we don’t plant if at all possible between say, June and September. It’s too hot for people to plant, so that limits more the time in which we’re planting.

But the reason it’s totally feasible and I feel real confident is, it isn’t just the city who’s planting. There are more than five nonprofits that plant trees in Los Angeles and do fundraising and community organizing around that. And they work very, very closely with the city and with each other to plant trees. There’s definitely a portion of this goal that’s going to be me doing some very strategic planning and grant writing and engaging our community groups and partners to help us reach this aspirational goal. But it’s doable. We have the partnerships and expertise in place to do it.

Q. Are there areas or neighborhoods that you plan to focus on?

A. Obviously, higher-need neighborhoods. We have areas around the Port of L.A. that have low canopy cover. We have portions of the San Fernando Valley which are extremely hot and could use some additional shade. And portions of South and East L.A. that also have tremendous opportunity to get additional canopy and are under different environmental and social burdens.

Q. Are there some benefits of urban trees that you think most people don’t realize?

A. Trees help us capture stormwater. They slow down rain when it falls from the sky, which is a huge deal here in Los Angeles, with our storm events, to be able to capture some of that water. [Water] droplets collect on the leaves and then run down the branches and have time to soak into the ground rather than just hitting the pavement and rolling away.

Another one that I don’t think people always think about is the transpiration that trees provide. They provide cooling overnight by releasing moisture through the transpiration process. That is something else that continues to amaze me. I remember I was in Washington, D.C., on a trip and walked through a city street and then walked through part of the National Mall that had tree cover. And it was so dramatically cooler. And it was nighttime, so it wasn’t that there was shade covering me. It’s again, those living things that are cooling the area.



Trees bring biodiversity, soil fertility, a cooler climate, cleaner air, increased rainfall, fodder, timber, fruits, nuts, green vegetables, medicinal herbs, shade and many other unseen benefits for the survival of all life on earth.

Planting trees is the simplest solution to our present-day environmental problems.

Under the agro-forestry model, farmers are educated about sustainable land use that maintains and increases total yields by combining food crops and tree-based ones.

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