Okay, I need to create a Wikipedia-style document about hybrid electric vehicles in Korean. Let me start by understanding the user's requirements.

First, the structure: H1 for the title, an overview section, several sections with H2 and H3 headings, and maybe references or related documents. The content needs to be accurate, objective, detailed enough, easy to read, and use technical terms with explanations. Also, markdown formatting with proper headings, lists, tables, code blocks if needed, and at least 800 characters.

The main topic is "하이브리드 전기차" (Hybrid Electric Vehicles) under the categories Technology → Automotive → Hybrid. Let me outline the sections.

Title: 하이브리드 전기차 (H1)

Overview: Introduce what hybrid electric vehicles are, their purpose, and maybe a brief history.

Then, sections like: - Definition and Types (H2) - Series vs Parallel (H3) - Plug-in Hybrid (H3) - Working Principles (H2) - Power Sources (H3) - Energy Management System (H3) - Advantages and Disadvantages (H2) - Pros (H3) - Cons (H3) - Market Trends (H2) - Global Sales Data (H3) - Leading Manufacturers (H3) - Environmental Impact (H2) - Emissions Reduction (H3) - Battery Recycling (H3) - Future Developments (H2) - Technological Innovations (H3) - Policy and Infrastructure (H3)

Need to make sure each section has enough detail. For example, in the definition, explain what a hybrid vehicle is, combining internal combustion engine and electric motor. Mention different types like series, parallel, and plug-in hybrids.

In working principles, describe how power sources work together, maybe include a diagram or table if possible. But since it's markdown, I can use a simple table for components.

Advantages: fuel efficiency, lower emissions, government incentives. Disadvantages: higher cost, battery issues, limited range compared to EVs.

Market trends could have data from recent years, like sales numbers by country, companies leading in production (Toyota, Honda, etc.).

Environmental impact: discuss how they reduce CO2 but also the environmental cost of batteries and recycling processes.

Future developments might include advancements in battery tech, charging infrastructure, government policies supporting hybrids.

Need to check for technical terms. For example, "전기 모터" is electric motor, "배터리" is battery. Make sure explanations are clear even if someone isn't familiar with the terms.

Also, ensure that each section flows logically and covers key points without being too verbose. Use bullet points or numbered lists where appropriate, like advantages and disadvantages.

Check for accuracy: For example, Toyota Prius was one of the first mass-produced hybrids. Plug-in hybrids have larger batteries and can be charged externally. Maybe mention specific models as examples.

Avoid any subjective language; stick to facts. If there's a debate about certain aspects (like environmental impact), present both sides but keep it neutral.

Make sure the document is over 800 characters. Let me count: each section should have enough content. The overview might be a paragraph, then each H2 section with several paragraphs and maybe sub-sections.

Also, include references or related documents at the end if needed, like links to other articles on electric vehicles, battery technology, etc., but since it's a wiki-style document, maybe just mention them in a "참고 자료" section.

Now, start drafting each part. Use H1 for the title, then H2 for main sections, H3 for subsections. Use bold or italic where necessary, but avoid overusing. Maybe use a table to compare different hybrid types.

Check for grammar and clarity in Korean. Make sure technical terms are explained. For example, "전기 모터" is an electric motor that assists the engine. "에너지 관리 시스템" manages power distribution between the engine and motor.

Avoid markdown code blocks unless there's specific code to show, which might not be necessary here. Use tables for data like market trends or types of hybrids.

Finally, review the entire document to ensure it meets all requirements: structure, content quality, formatting, length.