Despite noises made by fossil fuel industry-financed denialists, the overwhelming consensus among climatologists is that global warming is real and accelerating at a rate exceeding their worst predictions. The window to reduce atmospheric carbon emissions is quickly closing. Scientists have identified several "tipping points" beyond which efforts to slow Warming will be ineffective or negligible. That window is closing fast. See the recent article, Approaching a State Shift in the Earth's Biosphere in the June 7th issue of Nature magazine.

War with Iran would be enormously expensive. According to Nobel Prize winning economist Joseph Stiglitz, the wars in Iraq and Afghanistan cost over 3 trillion dollars, helping stoke massive government deficits. Another war against a much larger and better-armed Iran would make the other wars seem like a relative bargain. Consequently, the US would have few resources left to invest in new infrastructures necessary to curb carbon emissions or adapt to changes that will inevitably result.

So, if you are concerned about Global Warming, call your federal representatives and tell them in no uncertain terms: "No to war with Iran."

Ken Bonetti

Boulder


Transportation should be part of the debates

Presidential debates matter. They matter because candidates can elevate issues that might otherwise be lost. Both candidates did a great job of discussing their views on the economy. Hopefully in the next debate, candidates will seize the opportunity to discuss our national infrastructure and transportation systems.

Transportation is an economic powerhouse. For every $1 billion invested in public transportation, more than 36,000 jobs are supported, according to a white paper by the American Public Transportation Association. States are struggling to determine how to maintain and fund our infrastructure. We need leaders at the national level to contribute solutions and raise awareness about the state that it's in. With one more domestic policy debate, I hope the candidates make these issues a top priority.

Jeffery Kullman, president of Move Colorado

Aurora