In hour one of Here & Now's Dec. 20, 2017 full broadcast, we get an update on where the Republican tax overhaul stands from NPR's Kelsey Snell. Also, that overhaul includes a plan to raise revenue by allowing oil and gas drilling within parts of Alaska's Arctic National Wildlife Refuge, or ANWR. We hear how indigenous tribes could be impacted, and take a closer look at the ongoing drilling debate. And China, the world's biggest emitter of greenhouse gases, has launched the world's largest carbon trading market — placing the country as an unlikely global leader in the fight against climate change. NPR's Rob Schmitz tells us more about what the move signals.