matter is neither created nor destroyed it only transforms
Landfills are harfull to the environment because many substances cannot decompose like styrofoam and all this matter keeps building up but never decomposes
Answer:
Pick Hydrogen, but read below.
Explanation:
The blacks are Carbon. They have 4 connections. The left Carbon has 3 whites connected to it. It is not totally an exclusive answer, but the whites could be anything in Column 17 (F, Cl, Br, I) or Hydrogen. Likely it is hydrogen.
