Manila → Cebu · ~570 km
⛴️ Ferry: 23 kg CO₂ 🌱✈️ Flight: 143 kg CO₂
Choosing the ferry saves ~120 kg CO₂ (≈ 6 trees-worth of a year's absorption).
Manila → Puerto Princesa · ~590 km
⛴️ Ferry: 24 kg CO₂ 🌱✈️ Flight: 148 kg CO₂
Choosing the ferry saves ~124 kg CO₂ (≈ 6 trees-worth of a year's absorption).
Manila → Caticlan (Boracay) · ~315 km
⛴️ Ferry: 13 kg CO₂ 🌱✈️ Flight: 79 kg CO₂
Choosing the ferry saves ~66 kg CO₂ (≈ 4 trees-worth of a year's absorption).
Cebu → Bohol · ~70 km
⛴️ Ferry: 3 kg CO₂ 🌱✈️ Flight: 18 kg CO₂
Choosing the ferry saves ~15 kg CO₂ (≈ 1 tree-worth of a year's absorption).
Cebu → Dumaguete · ~130 km
🚌 Bus: 4 kg CO₂ 🌱⛴️ Ferry: 5 kg CO₂
Choosing the bus saves ~1 kg CO₂ (≈ 1 tree-worth of a year's absorption).
Estimates use ~0.25 (flight), 0.04 (ferry), 0.03 (bus) kg CO₂ per passenger-km — illustrative averages, not certified. For inter-island hops the ferry is almost always the lower-carbon (and often more scenic) choice. Compare schedules on ferry vs flight and transfers.