Opinionated answer. I hope that whatever you answer is not marked wrong, as the entire question is asking for an opinion
My Answer:
A lack of data portraying the effects of climate change.
I believe the lack of data portraying the effects of climate change is the largest obstacle in overcoming climate change due to it making it difficult for policymakers and the general public to understand the full extent of the problem and the need for urgent action. Climate change is a complex and multifaceted problem, and it is challenging to collect, analyze, and interpret the vast amounts of data that are needed to accurately assess its impacts. One of the reasons why there is a lack of data on the effects of climate change is that the impacts of climate change are not always immediately visible or easily measurable. Many of the impacts of climate change, such as sea level rise, changes in precipitation patterns, and the spread of diseases, are gradual and may take years or even decades to manifest. In addition, the effects of climate change can vary greatly depending on the location, the time of year, and the specific environmental conditions. Another reason why there is a lack of data on the effects of climate change is that the data that are available are often incomplete or difficult to interpret. Many of the data sources that are used to study climate change, such as satellite images, weather station data, and environmental monitoring networks, are expensive and time-consuming to collect and analyze, and they may not provide a complete picture of the impacts of climate change. Overall, the lack of data on the effects of climate change is a major obstacle in overcoming the problem, as it makes it difficult to accurately assess the extent of the problem and to develop effective solutions. To overcome this obstacle, it is essential to invest in research and data collection efforts that can provide a more comprehensive understanding of the impacts of climate change and the best ways to address them.