Questions with the keyword 'expensive'

• what do catylist converters in cars actually do and where else are they used and are they expensive? by blue to Adam, Eloise, Iona, Jarrod, Yip Comments: (No comments so far )
• if you could have any thing to help you in your job, however expensive it is, what would it be? by velociraptor to Adam, Eloise, Iona, Jarrod, Yip Comments: (No comments so far )