Southeast Asia has lost >50% of its original tropical forest cover since 1900. Seven interconnected drivers explain the decline:
Selective logging → degradation → conversion. 1970s–90s: Malaysia, Indonesia, Philippines, PNG, Solomon Is. exported >50% of global tropical logs. Roads opened frontier; "creaming" high-value dipterocarps left damaged stands vulnerable to fire and conversion.
Oil palm (Elaeis guineensis) is the #1 driver since 1990. Indonesia & Malaysia = 85% global output. 15–20M ha converted from forest. Also rubber, pulpwood (Acacia), rice, smallholder shifting cultivation.
Open-pit coal (East Kalimantan), copper/gold (Grasberg, PNG), nickel (Sulawesi, Philippines), bauxite. Direct clearing + infrastructure (roads, ports, settlements) → secondary deforestation.
Trans-Sumatra, Trans-Borneo highways; dams (Bakun, Nam Theun); megacities (Jakarta, Manila, Bangkok) sprawl into forest margins. Roads are the "first cut" enabling all other extraction.
Slash-and-burn (swidden) traditional; now amplified by drained peatlands (1997–98, 2015, 2019 El Niño fires: >10M ha burned). Peat fires emit gigatons CO₂; haze affects 100M+ people.
Droughts increase flammability; dieback of dipterocarps; range shifts. Forests become carbon sources, not sinks during extreme El Niño.
Weak enforcement, corruption, overlapping concessions (logging + palm + mining), unclear land tenure, inadequate FPIC (Free Prior Informed Consent) for Indigenous peoples. Moratoria (Indonesia 2011–2021) had limited effect due to loopholes.
Corporate NDPE (No Deforestation, No Peat, No Exploitation) commitments, jurisdictional certification, community forestry, REDD+ finance, and Indonesia's declining primary forest loss (2017–2022) suggest a possible inflection—but degradation continues.