1) Go to the room with the terminal from which you've downloaded the data on plants. Enter the room and turn around. You should be standing inside the room, but close enough to the door to be able to activate it.
2) There will be a gas leak right in front of you, by the entrance to another room which you can see from where you stand. Throw a grenade there to ignite the gas, then immediately shut the door to shield yourself from the fire.
It took me a little while to figure this trick out.
P.S. Wiki entry on There Stands the Grass seems to have been deleted. Weird.