Everyone takes a piece of raw horse-radish.

Question: Why do we eat this Bitterness?

“So the Tight Place made the God-wrestlers subservient with crushing-labor; they embittered their lives with hard servitude in clay and in bricks and with all kinds of servitude in the field, all their serfdom in which they made them subservient with crushing-labor. (Exodus 1: 13-14.)

Invite the phrases that invoke flooded cities, ruined mountains, parched fields, etc.

Give a chunk of blood-red beet to everyone.  Question:  Why do we eat this blood-red beet?

“To remember the sacrifices, deaths, and woundings of those who have struggled for justice.” Especially now, we remember the death of Dr. Martin Luther King, Jr., on  April 4, 1968.
I have been to the mountaintop. … I just want to do God’s will. And He’s allowed me to go up to the mountain. And I’ve looked over. And I’ve seen the Promised Land. I may not get there with you. But I want you to know tonight, that we, as a people, will get to the promised land!  — —  Dr. Martin Luther King, Jr., April 3, 1968
Invite other names of those who have been killed in their work for justice or killed by global scorching, like those who died in Superstorm Sandy.  
Invite a free-form blessing of memory.

Everyone eats a chunk of the beet.

haggadah Section: Maror
Source: https://theshalomcenter.org/content/palms-passover-interfaith-healing-seder-earth