646 views stevepb/Pixabay The United States can save US$3.5 trillion by launching a serious greenhouse gas reduction effort now, rather than waiting until 2030—without even factoring in the public health benefits of fossil fuel reductions, or the avoided cost of climate-driven extreme weather, according to a new report by San Francisco-based Energy Innovation. “If action begins in 2030, the cost of transitioning to a clean energy economy will be an estimated 75% higher than if action were to begin this year,” Quartz reports. “That works out to roughly $750 billion each year in the 2030 scenario (for a total of about $8 trillion), compared to peak costs of $320 billion per year if early action is taken (for a total of $4.5 trillion).”