Cities across the United States are feeling the rise of the ride-hailing industry, most acutely in urban cores, and they struggle to keep up with impacts ranging from declining mass transit ridership to increasing congestion. And the industry’s continued growth presents an even deeper challenge: rising climate pollution. Ride-hailing trips today result in an estimated 69 percent more climate pollution on average than the trips they displace. Fortunately, the industry can implement several strategies to address the negative impacts of ride-hailing and contribute to a low-carbon transportation future. It must move rapidly to electrify vehicles, increase pooled trips, and complement mass transit. Governments can support those efforts with smart policies that reduce pollution and support efficient, equitable transportation systems. And individuals can make informed choices among transportation options to reduce congestion and pollution, and encourage companies to offer cleaner options.