Many of us grew up watching Captain Planet - the environmental superhero who brought polluting eco-villans to justice when summoned by the five "Planeteers".

But despite being a cartoon, there are real-life political equivalents in Congress who spend their careers fighting to protect natural resources from corporate polluters and global warming. So who are the five would-be Planeteers in Washington with the most liberal record on the environment?

They are:

What about other key issues? Who are the biggest champions of Civil Rights in Congress? Can you guess?

Find out now