Andover has taken the lead over Exeter in the Green Cup Challenge with a drop in energy consumption of 1.69%, which translates to 15,666 pounds of carbon dioxide emissions.

This drop has saved the school an average of 176,000 kilowatt hours per week during the winter. Exeter has increased its energy consumption by 2.46%.

Andover, along with eight other schools, is also thinking about starting another phase of the GCC. Titled the “Green Cup Challenge 2.0,” the competition...