Climate justice is a type of environmental justice that focuses on the unequal impacts of climate change on marginalized or otherwise vulnerable populations. Climate justice seeks to achieve an equitable distribution of both the burdens of climate change and the efforts to mitigate climate change through advocacy and policy change. The economic burden of climate change mitigation is estimated by some at around 1% to 2% of GDP. Climate justice examines concepts such as equality, human rights, collective rights, justice and the historical responsibilities for climate change.