As a well-traveled broadcaster and naturalist witnessing the impacts of climate change firsthand, I firmly believe that high-income nations have an obligation to lead the way in tackling climate change. We have reaped the greatest benefits from fossil fuels and thus have the greatest responsibility to act now. The wealthier nations have the financial and technological resources to make the most significant changes and to support the global effort, particularly in helping lower-income countries to follow suit without compromising their development.