A Lake Placid science teacher and her students hope to help the Tri-Lakes area go green in a big... A Lake Placid science teacher and her students hope to help the Tri-Lakes area go green in a big way by next summer. Tammy Morgan, who teaches environmental science and biology, and high school senior Chris Williams, led a school team that planned a bio-digester project that will be one of the first community-scaled systems in the country.