DHAKA, Bangladesh (AP) — John Kerry, the special U.S. envoy on climate, says President Joe Biden is eager to work with Bangladesh in dealing with the impact of climate change after the United States’ return to the Paris accord. Kerry is in Dhaka to hear what the low-lying South Asia delta nation has done to cope with weather extremes and rising sea levels ahead of a virtual summit on climate change that Biden is hosting this month. Some experts warn that rising sea levels could devour much of Bangladesh’s vast coastal region, and cyclones and tidal surge destroy agriculture and the livelihoods of millions. The world’s largest mangrove forest, Sundarbans, which straddles the border of Bangladesh and India, is especially vulnerable.