https://techcrunch.com/2021/04/12/ecocart-raises-3-million-for-a-honey-like-browser-extension-to-offset-shoppers-carbon-emissions/

EcoCart, a company pitching consumers on ways to offset their carbon emissions for free at select merchants (with a browser extension!) has raised $3 million in financing from Base10 Partners.

Brands pay the company a commission to drive traffic to their websites under a standard affiliate marketing model and EcoCart uses a portion of the proceeds to offset a shopper’s carbon emissions.