Another of the endless global warming summits (they are annual affairs arranged by The U.N.) is about to begin in Paris.
The Global Warming Policy Forum has put together a pretty good primer on the rounds of talks which have taken place since 2007. Instructive!
I didn’t have any technology except my practical way of doing things. So I told them by pulling on the spring. If it is hard to pull it means that it would hit harder and that’s how I do it.