The world's first theme park aimed at educating the public about sustainability and global warming has opened in the US.
A publisher promoting "intelligent optimism" has suggested 10 ways to enjoy greener summer weekends.
Using toys to illustrate how to create positive societal impact.
Meet the Goode Family; their series sends up right-on, do-gooding eco-types such as "self-respecting Guardian-reading, tofu-knitting liberals".