put a lid on it

Ohhhhh I wish I could find this one Cosby show special or PSA or something where Clair Huxtable talks about how we can boil water quicker along with conserving energy by putting a lid on your pots and kettles when boiling water! I could be making all this up and have selective memory from my childhood but regardless, put a lid on it! Having a lid on your pot keeps the heat and energy from escaping your pot so that more of it stays to heat up your agua quicker. Quicker heating time = less energy used!