Various: The United States will have a much harder time meeting goals for 2050 greenhouse gas emission cuts than Russia and a number of other wealthy countries that have decreasing populations, according to the results of a Reuters survey. In July, those heading up the Group of Eight came to an agreement that they would make an expensive move to reduce emissions in developed nations by an average of 80 percent by 2050 by making the switch to renewable energies. They believe this goal could …