Paragraph 6

As a result, the Olympic Village built for the 2000 Sydney Summer Olympics became the world’s largest solar-powered suburb and the 2002 Salt Lake City Winter Olympics adopted a new energy recycling system which used the curling hall’s air conditioning unit to heat the showers and bathrooms in the venue.

Also, for the 2010 Vancouver Winter Olympics, the Olympic speed-skating venue was built with salvaged timber.

The Olympic Park for the 2012 London Summer Olympics, which was built on industrial land that was once contaminated, was converted to the biggest urban park in Europe.

Then at the 2020 Tokyo Summer Olympics, electricity was generated with hydrogen instead of fossil fuel, which supplied power for many residential buildings in the Olympic Village and Paralympic Village.

built for ... Olympics는 the Olympic Village를 수식하는 분사구이다.

which used the curling ... in the venue는 a new energy recycling system을 수식하는 관계절이다.

The Olympic Park for the 2012 London Summer Olympics, which was built on industrial land that was once contaminated, was converted to the biggest urban park in Europe.

which was ... once contaminated는 The Olympic Park for the 2012 London Summer Olympics를 부가적으로 설명하는 관계절이다.

which 절 안의 that was once contaminated는 industrial land를 수식하고 있다.

which supplied power ... Paralympic Village는 앞 절의 내용을 부가적으로 설명하는 관계절이다.

After the event has ended, in addition to the significant amount of trash that needs to be disposed of, the effects those people caused and the emissions generated from their travel continue to have a lasting negative impact on air quality.

that needs to be disposed of는 trash를 수식하는 관계절이다.

those people caused는 the effects를 수식하는 관계절로 앞에 목적격 관계대명사가 생략되었다.

generated from their travel은 the emissions를 수식하는 분사구이다.

It turns out that participants do not make bad impressions but make better impressions than they think.

It은 형식상의 주어이고 that 이하가 내용상의 주어이다. ‘A가 아니라 B’의 뜻인 not A but B 구조가 사용되어 make bad impressions와 make better impressions than they think가 but으로 대등하게 연결되어 있다.