The letter from major US companies urges President Trump to keep the US in the Paris Agreement on climate change. It argues that remaining in the agreement benefits US businesses in three key ways: 1) it ensures a balanced global effort that reduces competitive imbalances, 2) it expands markets for clean technologies and generates jobs and growth, and 3) it helps reduce long-term climate change impacts and business risks. The companies believe US leadership is best exercised by remaining in the global agreement.