Make up a new global threat on the level of global warming.
A made up threat with large scale effects on the world could be as follows:
A rogue planet passing through our solar system has caused earth to slowly spiral away from the sun.

To explain why this is on the same level as global warming, consider the following:
 - The slow movement away from the sun will gradually cause the world to cool down, as the sun's rays grow weaker. This cooling effect will drastically affect global food production, and eventually cause crop failures as the climate rapidly drifts from normal. This will, expectedly, cause massive human suffering in various forms such as famines, social unrest and falling goods supplies.
 - This threat mirrors global warming in its predictability before the turning point: A rogue planet approaching earth would have been noticed years or even decades in advance, allowing the possibility for plans to be enacted to avoid pr otherwise defuse the threat.
 - The threat will not equally impact all of the world, like global warming: Food shortages will affect countries which import it more that exporters. Weakening sunlight will cause regions dependent on solar to suffer energy shortages, while other regions which use non-solar energy will be able to avoid the shortage. Goods like cotton, bioplastics, and other plant based substances are usually very regional in their production, and this will affect trade and the well being of those farming the resource.