The joy of a cut Christmas tree is fleeting. All the festive fun is front-loaded: picking out the perfect specimen, bedazzling its boughs with lights and meaningful ornaments, and gathering around it to sing carols and sip eggnog. Then come all the grinchy downsides: the inevitable browning and dropping of countless needles, the begrudging haul to the curb (leaving another trail of needles) and, finally, the guilt of knowing it likely will end up in a landfill – or being mulched by an eco-unfriendly woodchipper run by fossil fuel.