digraph cost_reality {
  bgcolor="#1a1a2e"
  rankdir=LR
  node [fontname="Helvetica" fontsize=10 style=filled shape=box]
  edge [style=invis]

  label=<<B><FONT COLOR="#cccccc" POINT-SIZE="14">cost per kg: petroleum vs hemp</FONT></B>>
  labelloc=t

  subgraph cluster_petro {
    label="PETROLEUM PLASTIC" fontcolor="#F44336" fontsize=11 fontname="Helvetica Bold"
    color="#F44336" style=dashed

    hdpe [label="HDPE\n$0.90-1.40/kg" fillcolor="#B71C1C" fontcolor="white"]
    pp [label="polypropylene\n$2.20-2.53/kg" fillcolor="#C62828" fontcolor="white"]
    pet [label="PET\n$1.00-1.50/kg" fillcolor="#D32F2F" fontcolor="white"]
    hdpe -> pp -> pet
  }

  subgraph cluster_bio {
    label="BIOPLASTIC" fontcolor="#4CAF50" fontsize=11 fontname="Helvetica Bold"
    color="#4CAF50" style=dashed

    pla [label="PLA (corn)\n$2.00-3.00/kg" fillcolor="#2E7D32" fontcolor="white"]
    hemp [label="hemp bioplastic\n$5.00-5.20/kg" fillcolor="#388E3C" fontcolor="white"]
    pha [label="PHA (microbial)\n$4.00-9.00/kg" fillcolor="#43A047" fontcolor="white"]
    pla -> hemp -> pha
  }

  gap [label="hemp bioplastic costs\n2-3x petroleum plastic today\n\nno subsidies, no scale,\nno infrastructure yet\n\nprice drops with volume\nPLA fell 50% since 2007" fillcolor="#263238" fontcolor="#CDDC39" shape=note]
}
