Is an international issue facing the US and the world in ST century?

One significant international issue facing the US and the world in the 21st century is climate change. This global challenge threatens ecosystems, economies, and public health, requiring coordinated efforts among nations to mitigate its impacts. The urgency of transitioning to sustainable energy sources and reducing greenhouse gas emissions is paramount, as climate-related disasters become increasingly frequent and severe. Addressing this issue demands collaboration, innovation, and commitment from all countries to ensure a sustainable future.