Carbon Emissions Flow

import matplotlib.pyplot as plt
import matplotlib.patches as mpatches
from matplotlib.path import Path

def draw_flow(ax, x0, y0, x1, y1, w0, w1, color, alpha=0.6):
    cx = (x0 + x1) / 2
    verts = [
        (x0, y0 + w0/2), (cx, y0 + w0/2), (cx, y1 + w1/2), (x1, y1 + w1/2),
        (x1, y1 - w1/2), (cx, y1 - w1/2), (cx, y0 - w0/2), (x0, y0 - w0/2),
        (x0, y0 + w0/2)
    ]
    codes = [Path.MOVETO] + [Path.CURVE4]*3 + [Path.LINETO] + [Path.CURVE4]*3 + [Path.CLOSEPOLY]
    ax.add_patch(mpatches.PathPatch(Path(verts, codes), fc=color, alpha=alpha, ec='none'))

def draw_node(ax, x, y, w, h, color, label):
    ax.add_patch(mpatches.FancyBboxPatch((x-w/2, y-h/2), w, h, boxstyle="round,pad=0.02",
                                          fc=color, ec='white', lw=1.5))
    ax.text(x, y, label, ha='center', va='center', fontsize=8, color='white', fontweight='bold')

fig, ax = plt.subplots(figsize=(14, 8), facecolor='#0a0a0f')
ax.set_facecolor('#0a0a0f')

s = 0.12

# Sectors to total
draw_flow(ax, 0.5, 7.5, 2.5, 5.5, 15*s, 15*s, '#F54927', 0.7)
draw_flow(ax, 0.5, 5.5, 2.5, 4.8, 12*s, 12*s, '#C82909', 0.7)
draw_flow(ax, 0.5, 3.5, 2.5, 4.2, 10*s, 10*s, '#9C2007', 0.7)
draw_flow(ax, 0.5, 1.5, 2.5, 3.5, 8*s, 8*s, '#F5B027', 0.7)

# Nodes
draw_node(ax, 0, 7.5, 0.6, 15*s*1.3, '#F54927', 'Energy\n15 GT')
draw_node(ax, 0, 5.5, 0.6, 12*s*1.3, '#C82909', 'Transport\n12 GT')
draw_node(ax, 0, 3.5, 0.6, 10*s*1.4, '#9C2007', 'Industry\n10 GT')
draw_node(ax, 0, 1.5, 0.6, 8*s*1.5, '#F5B027', 'Buildings\n8 GT')
draw_node(ax, 3, 5, 0.6, 45*s*1.1, '#F5276C', 'Total CO2\n45 GT')

ax.set_title('Global Carbon Emissions by Sector', fontsize=16, color='white', fontweight='bold', pad=20)
ax.set_xlim(-1, 4)
ax.set_ylim(0, 9)
ax.axis('off')
plt.tight_layout()
plt.show()