for headings. We'll keep that.
Also meta description: "DR Congo has launched an investigation into cobalt exports contaminated with uranium, raising global security and health concerns and questioning the effectiveness of international oversight." -> "刚果（金）已对受铀污染的钴出口展开调查，引发全球安全和健康担忧，并对国际监管的有效性提出质疑。"
Now we need to output JSON. Ensure valid JSON with double quotes. We'll escape any double quotes inside.
Let's construct the content HTML. We'll use the translated paragraphs with same structure.
Original content: ...
...
...
...
