A business-as-usual approach to climate change will be "disastrous" for Asia, undoing much of the phenomenal economic growth that has helped it make vast inroads against poverty, the Asian Development Bank said in a report released Friday. A continued reliance on fossil fuels will see the world's most populous region face prolonged heat waves, rising sea levels, and changing rainfall patterns that will disrupt the ecosystem, damage livelihoods and possibly even cause wars, it said. "Unabated climate change threatens to undo many of the development advancements of the last decades, not least by incurring high economic losses," the report from the Manila-based bank said.