The article discusses the history of understanding climate change, highlighting the efforts of scientists to measure its impacts. Greenhouse gases are causing the Earth to warm up, leading to human-made climate change. The 2013 US Climate Action Plan aims to cut carbon emissions and deal with climate change's effects. Many US states and communities are also taking steps to reduce greenhouse gases and adapt to climate change's impacts, especially on vulnerable groups. Even though we've known about climate change for over 40 years, not enough has been done to reduce greenhouse gas levels and combat global warming. The focus is now on collaborating better between government, businesses, and society to tackle climate change and ensure people understand how it affects health and the economy.