Every week, it's something different.
More people are choosing not to vaccinate their children. As numbers grow, so does the risk of their losing “herd immunity.” The case for this behavior is very weak, especially as the spectre of the return of some really awful diseases increases.
In a year, Japan has reduced the share of its power generated from nuclear reactors from 30% to zero. Yep. Zero. Where will the monsters come from now?
People are driving 20% less now compared to the 1970s. Blame the Internet and women working. I have never driven more in my life than I do in my current situation, with a reluctant student who is also an aspiring piano player/dancer/actress.
DNA from hard to find species can be found in leeches, which are, um, much easier to find.