While fossil fuels are challenges on many systemic levels — biological, economic, political, international — one of the most daunting obstacles is human cognition. (commonwealthclub.org)
These may have seemed like daunting obstacles, and many tried to talk us out of running. (politico.com)
De Blasio's plan to open four safe injection centers aimed at reducing overdose deaths faces daunting obstacles, including possible opposition from the federal government, finding locations to house the facilities and persuading communities to accept them. (nystateofpolitics.com)