Estimate the carbon dioxide emission avoided in one year by using on-site solar energy for water heating in a residence where in average 40 l/day of water is heated 25 ∘C above ambient temperature....

Estimate the carbon dioxide emission avoided in one year by using on-site solar energy for water heating in a residence where in average 40 l/day of water is heated 25 ∘C above ambient temperature.

Estimate the yearly carbon dioxide offset by using twenty solar landscaping lights from dusk to dawn instead of twenty 5 W lightbulbs supplied from grid electricity.