Since Ginro wanted a silver spear so much Senku made him one. And well beacuse they needed someone to check if the path they took it safe.
Next material is the most dangerous one to get from the list to make the cure for all.
At fist Ginro looked all happy, being the protector of the team and all but after Senku told him that one breath of this stuff can kill you, he got realy scared and stayed behind.
Not for long of course, since Kohaku said she will take the spear if he continues to be such a coward.
Finally they arrived at the lake. Giro almost walked too close since it looked so nice. Thankfully others saved him.
Now they know about how close they can get. Time to go back home and make some gas masks.