Lesotho's King Letsie III has embarked on an ambitious mission in snowy Davos, where global powerbrokers have converged, to make a royal pitch: invest in his small African nation's green transition.

The study took place in 29 mainly rural villages across five districts in Lesotho. Men and women between the ages of 18 and 32 were eligible to enroll, whether or not they were HIV-positive or ...