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For development experts, such as Ehrhart, climate change is a formidable foe that must be tackled.
CNN: Climate change may displace up to 200 million
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Ehrhart said climate migration could climb to staggering levels, its consequences reaching far and wide.
CNN: Climate change may displace up to 200 million
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"So if the rains don't come when needed, you don't lose an entire crop, " Ehrhart said.
CNN: Climate change may displace up to 200 million
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Climate change will exacerbate stressful conditions unless vulnerable populations, especially the poorest, are assisted in building climate-resilient livelihoods, Ehrhart said.
CNN: Climate change may displace up to 200 million
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Ehrhart said the breakdown of ecosystem-dependent livelihoods is likely to remain the main driver of forced migration during the next few decades.
CNN: Climate change may displace up to 200 million
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In the Mekong River Delta, for instance, the sea level rising by 2 meters (6.5 feet) could mean the loss of millions of acres of agricultural land, reducing it by half, Ehrhart said.
CNN: Climate change may displace up to 200 million