In this environmentally-themed QotW we find out how nations across the globe add up their greenhouse gas contributions. Does everyone do CO2 accounts in the same way? Plus, we ask why it is that pets look like their owners. Like this podcast? Please help us by <a href="https://www.thenakedscientists.com/donate">supporting the Naked Scientists</a>

Do pets look like their owners?

Each week we set out to solve one of the world's weirdest, wackiest, funniest and funkiest scientific puzzles. And along with the answer there's a brand new question to think about for next time...