Former Fed Chair Janet Yellen says it's OK for the US to add to its $23 trillion debt pile — as long as it's used to pay for climate change and education programs

· *Former Federal Reserve chair Janet Yellen says the US can "afford" to increase its spending or cut taxes because it's cheap to borrow with low interest rates.*
· *The additional room could give policymakers more leeway to spend more in infrastructure, education, combatting climate change and other programs to spur long-term...