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With global warming getting worse, urgent action is needed, climate scientists say
Fletcher Professor Emeritus William Moomaw comments on the latest warning on climate change from the U.N.'s International Panel on Climate Change, via an article in The Boston Globe.
The United States and other countries stand to learn from some smaller nations that have taken bold action, such as Costa Rica, which two years ago pledged to produce no more carbon emissions than it could offset by 2050, said Bob Chen, interim dean at the School for the Environment at the University of Massachusetts Boston
“We all need to take that kind of responsibility,” he said.
The United States has sent the world mixed signals over the years.
Pledges and policies designed to reduce emissions during the administrations of Presidents Clinton and Obama were overturned by their Republican successors. Most notably, President Trump in 2017 pulled out of the Paris climate accord, which the Obama administration helped create and persuaded nearly 200 other nations to sign.
President Biden has once again moved the nation back into a leading role to address climate change. Since taking office in January, he has pledged to reduce US emissions by at least 50 percent below 2005 levels by the end of the decade.
But it's unclear whether the country can achieve that without Republican support. Some of the measures that might have moved the country in that direction were stripped recently from a bipartisan infrastructure bill that some viewed as a potential legislative vehicle to curb emissions.
The United States — the largest source of cumulative greenhouse gas emissions over the past 150 years — has also failed to live up to its promises to help provide billions of dollars to help developing countries make the transition to a carbon-free future, experts said.
“The bottom line is that we have a lot of catching up to do,” said Mindy Lubber, president of CERES, a Boston-based environmental group that promotes climate action in the corporate world. “We need to make commitments and put money on the table.”
Still, Lubber and others said the United States could only do so much to wrest the planet from the worst outcomes forecast in Monday's report by the Intergovernmental Panel on Climate Change.
The report found that the planet has already warmed 1.1 degrees Celsius since the preindustrial era and is rapidly approaching the 1.5-degree threshold that the Paris agreement was designed to prevent. The consequences are expected to become more severe after the planet passes that threshold, which the report said is now likely to occur in the next 20 years — a decade earlier than previously thought.
Bill Moomaw, a retired professor of international environmental policy at Tufts University, noted that other major countries, such as China, India, and Brazil, must do much more as well. China and India, he noted, continue to build coal power plants, which produce an inordinate amount of carbon pollution, while deforestation has accelerated in Brazil, which has often been described as the planet's lungs.