President Zelensky announced this week that Russian troops have begun the battle for the Donbas region of Ukraine. As we enter week nine of Russia's invasion, this long-awaited offensive could be a decisive second phase of the war. Plus, how to talk to your kids about climate change. And, a new, shorter number to reach the National Suicide Prevention Lifeline. Guests: Axios' Dave Lawler and UK-based science and education consultant Claire Seeley.Credits: Axios Today is produced by Niala Boodhoo, Sara Kehaulani Goo, Alexandra Botti, Nuria Marquez Martinez, Alex Sugiura, and Lydia McMullen-Laird. Music is composed by Evan Viola. You can reach us at podcasts@axios.com. You can text questions, comments and story ideas to Niala as a text or voice memo to 202-918-4893.Go deeper: Russia begins large-scale offensive in eastern Ukraine Dashboard: Russian invasion of Ukraine New suicide hotline number is unknown to most Americans