A. BUT FOR KOTAHATUHAHA AND HIS TEAM, BIG PROBLEMS REQUIRE BOLD I...

77. A. But for Kotahatuhaha and his team, big problems require bold innovation.B. It's an early concept design, and many questions remain.C. Since 1990, British physicist John Lanham has explored a technique known as marine cloud brightening, in which particles -- such as the salt in seawater -- are injected into clouds to increase the amount of sunlight they reflect.D. Detractors say that plans to refreeze the Arctic address the symptom, not the cause.