Explain why global agreement on actions to reduce greenhouse gas emissions is difficult to achieve?

Global agreement on actions to reduce greenhouse gas emissions is difficult to achieve due to the negative public perception of certain 'greener alternatives', the price of switching to renewable energy and the inherent power imbalances in global politics that mean that some countries feel less obliged to conform.
Public perception of supposed 'greener' alternatives obstruct global agreement as general populations are not keen to implement certain types of power generation through fear that it will endanger them. For example, whilst Nuclear energy produces considerably less greenhouse gas than a fossil fuel, high profile disasters such as Chernobyl (1986) and Fukushima (2011) mean that local populations often refuse and veto nuclear power. Following Fukushima, Germany permanently shut down 8 of its 17 reactions and pledged to close the rest by the end of 2022, largely as a result of the public perception that it was unsafe and not worth the risk. Global agreement is obstructed by public perception as the opinion of the people is preventing governments from implementing certain techniques to reduce greenhouse gas emissions. If governments cannot implement the processes to reduce greenhouse gas emissions, then it is almost impossible to achieve agreement between government on how to move forward.
The price of switching obstructs global agreement because many governments already have considerable fossil fuel resources, meaning that it would be incredibly expensive to swap to greener techniques. For example, China's coal reserves will operate successfully for over 79 years, which in turn, in their minds, makes any switch a financial risk. The fossil fuels resources of many countries mean that it would be an added expense to swap to techniques that reduce greenhouse gas emissions. This, in turn, makes some governments reluctant to swap to greener techniques, which in turn makes a global agreement very hard.
Finally, the global power imbalances within politics make it easy for some countries to ignore global agreements. For example, the United States of America, being a global superpower, could afford to not ratify the Kyoto Agreement (signed 1997 by the majority of the world's countries, each of which pledging to reduce greenhouse gas emissions) as it was almost impossible for any group or government to impose this agreement on them. As a result of this, other countries refuse the agreement as it is seen that if the most powerful countries (and, similarly, the countries that produce the most greenhouse gases) are not conforming, why should all other governments. This was seen in India, where greenhouse gas emissions rates have risen year on year since 1997. Global agreement on greenhouse gas emission is hard to achieve as some governments do not take it as seriously, which in turn sets a precedent for other governments to act irresponsibly.
Overall, global agreement on actions to reduce greenhouse gas emissions is hard to achieve due to popular perception, money, and power. Targets an agreement is based on cannot be achieved if governments' population do not allow it, if governments do not see it as financially viable, and if governments do not see a global effort.