Carbon dioxide pollution levels in Earth's atmosphere hit a record high in 2012, according a UN report released Wednesday. The concentration of carbon dioxide, a primary contributor to global warming, is far beyond the level some scientists and environmental groups say is the upper limit for a safe level.
Some in Congress want to impose additional punitive sanctions on Iran. These are unnecessary and could scuttle the diplomatic process and strengthen Iranian hardliners. The proven strategy now is to offer partial relief from sanctions as an incentive to encourage Iranian concessions.