evidence: Anyone who tells you that we are, is not paying attention to the historical data. Instead, they are concerned about what "might" happen in the future, based on predictions from inadequate climate models, driven by unrealistic assumptions. [...] - Humans are adding carbon dioxide to the atmosphere by burning fossil fuels. [...] "Key takeaway: Scientific evidence shows that modern global warming is primarily driven by increasing CO2 emissions from human activities. There is no evidence that solar variations or volcanic activity are substantial drivers of recent climate change."