Greenhushing, in which companies quietly get on with the task of decarbonizing without boasting about it, was once thought to be a way of avoiding accusations of greenwashing and complying with environmental-claims regulations. Now, it seems like it’s more to avoid rocking the boat with climate-skeptic politicians and consumers. A landscape where climate action can only be discussed sotto voce adds both a challenge and a potential direction for the important, but nascent, carbon-removal industry