Grist: There have been more disappointments than encouraging signs at the U.N. climate talks in Warsaw, Poland, which have just passed the halfway mark. They`re intended to lay the groundwork for a new global climate treaty to replace the Kyoto Protocol, but it`s not going well so far. Rich countries are not outlining how they will fund the planned $100-billion-a-year Green Climate Fund. Discussions involving agriculture have been taken off the table, even though farming reforms could substantially reduce...