They eventually spotted a clear pattern: Methane emissions had increased sharply across the tropics, where wetlands were growing wetter and warmer. Spark Climate Solutions (not to be confused with this newsletter) hopes to change that. This one would specifically explore how a range of climate feedback effects could propel additional warming, additional emissions, and additional types of feedback. “These increased emissions from natural sources add to human emissions and amplify climate change,” says Phil Duffy, chief scientist at Spark Climate Solutions, who previously served as climate science advisor to President Joe Biden. That, in turn, would give nations a more accurate sense of the world’s carbon budgets, or the quantity of greenhouse gases they can produce before the planet reaches temperatures 1.5 °C or 2 °C over preindustrial levels.