This list, and a larger list of G20 states, includes both...
Largest states are responsible to lead on climate change.
US, Japan, China, Germany, India, and Brazil are among the largest and most powerful countries in the world. This list, and a larger list of G20 states, includes both developed and developing nations. China, India, and Brazil are the most notable large developing nations in the G20. Due to their size, economic power, and emissions (now and in the future), they share an equal responsibility to fight global warming. For the same reason, they share an equal responsibility with developed nations to apply their leadership role in their respective regions to lead the fight against climate change. If they do not, surrounding countries - fearing a loss of competitiveness in particular - will not take strong actions to combat global climate change. Therefore, it is important that all of the most powerful nations in the world - developed or developing - lead their regions in the fight on global climate change.