I've heard that sudden popularity of digital cameras have caused a severe reversal of global warming. What's happened is the constant use of chemicals in photographer's dark rooms kept eating away at the earth's ozone layer providing use lots of sunshine. 

Now that no one is using these dark rooms, the ozone layer is rapidly repairing itself and causing the earth to get colder. Environmentalist are lobbying to ban digital cameras or at least pass a law that all professional digital camera users are also required to continue buying film on a 50/50 basis and process in the usual manner.

How will they ever enforce this?