A crowd of demonstrators gathers outside of City Hall during the Global Climate Strike in Seattle, Washington, U.S., on Friday, Sept. 20, 2019. Thousands of workers at Microsoft Corp. and Amazon.com Inc. walked out without their bosses’ blessings to protest rising global temperatures. Photographer: Chloe Collyer/Bloomberg
Even before Greta Thunberg began her campaign more than a year ago, I was becoming more conscious as the chorus grew louder and louder. Collyer / Bloomberg

To Greta Thunberg and to my sons: I am sorry my generation has failed you