If you love the Earth, every day should be Earth Day. We should always work to keep the environment clean...recycle, don't litter, etc.
That said, keep in mind the political forces behind Earth Day. They are the radical left. The communists who want to squash any remnants of capitalism. They hate growth, they hate wealth...they hate America. Earth Day was planned to coincide with Communist Day, the birthday of Lenin.
When you shed a tear while filling your gas tank or paying your heating bill, thank the radical environmentalists. They are the activists who lobby liberals in Congress to avoid any oil exploration, to deny the construction of any new refineries, and to require over fifty different blends of gasoline.
Time to drill. Time to build. Time to unleash American capitalism.