Professor of Environmental Engineering + Environmental Health Sciences, UC Berkeley. Research: air pollution, health, climate, EJ.https://bsky.app/profile/joshapte.bsky.socialhttps://bsky.app/profile/joshapte.bsky.social/post/3lnt3c7fehs2hI took advantage of the spring weather to sneak in a little hike in the Viennese Alps this morning before the start of #EGU25. Awesome to see this old smokestack being repurposed for solar energy. A nice metaphor for the change we need!27 Apr 2025 20:21 +0000at://did:plc:a5dibyn35fvxda3kmnau22od/app.bsky.feed.post/3lnt3c7fehs2hhttps://bsky.app/profile/joshapte.bsky.social/post/3lmwyfsywxs27Most rail services in the US still use polluting diesel locomotives. Recently, our commuter rail system in San Francisco, @caltrain.com, was electrified. Good news: we found DRAMATIC air quality improvements once the electric trains replaced the diesels. https://pubs.acs.org/doi/10.1021/acs.estlett.4c0109616 Apr 2025 16:15 +0000at://did:plc:a5dibyn35fvxda3kmnau22od/app.bsky.feed.post/3lmwyfsywxs27https://bsky.app/profile/joshapte.bsky.social/post/3lmvvxbhgbs26Hey everyone, nice to be back online here at Bluesky. I love how fresh and earnest this place feels - reminds me of the good old days.16 Apr 2025 05:58 +0000at://did:plc:a5dibyn35fvxda3kmnau22od/app.bsky.feed.post/3lmvvxbhgbs26