Showing customers the environmental impact of driving, French car rental company Europcar now lists CO2 emissions for its rental cars. The information can be found both on the company’s website, and on customer invoices, allowing conscientious drivers to take emissions into account when choosing a rental car, as well as reminding them after the fact. Customers are also offered the chance to offset their emissions via a collaboration with Climate Care. Instead of planting trees, Climate Care assists with the development of renewable fuel sources and more efficient systems—arguably a more effective way of tackling carbon emissions than planting trees.