Bombardier Challenger 350 Dethrones Embraer Phenom 300 as the Most-Delivered Business Jet

The Embraer Phenom business jet is well designed and comfortable from a pilots perspective, however it really is a tiny business jet. There is not a lot of room aft of the pilot. I think it carries a maximum of 4 passengers. It's a pretty expensive little jet for 4 people. I believe that this is an inappropriate use of resources as an aircraft for executive aviation. You could be spewing tons of carbon into the atmosphere for 2 people. Is that practical or efficient? What about the environment?