I found this on a site featuring various WWII propoganda posters:

According to an article on the BBC News website, at least 25% of the world’s mammal species are at risk of extinction.” This includes 1,141 out of 5,487 species, and the authors of the study say that number may be an under-estimate.
Quoted from Roger Waite, Times Online, “Planet Feels Heat of Divorce“:
The growth of single-person households is also damaging the environment. Research published in the journal Environment, Development and Sustainability found that: