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Greenhouse gases record levels – level 1

01-11-2024 15:00

There is a new report by the UN. It...

Greenhouse gases record levels – level 2

01-11-2024 15:00

The UN report says that the world is behind...

Greenhouse gases record levels – level 3

01-11-2024 15:00

According to a recent UN report, global efforts to...

The Sallie House – level 1

18-09-2024 15:00

In the 1870s, a doctor lives in a small...

The Sallie House – level 2

18-09-2024 15:00

In the 1870s, a doctor lived in a small...

The Sallie House – level 3

18-09-2024 15:00

It looks like an ordinary small house; however, once...

Reasons for yellow US school buses – level 1

06-08-2024 15:00

480,000 school buses are in the US. They take...

Reasons for yellow US school buses – level 2

06-08-2024 15:00

Over time, most school buses in the US became...

Reasons for yellow US school buses – level 3

06-08-2024 15:00

Have you wondered why US school buses are yellow?...

Buses without drivers – level 1

19-04-2024 07:00

Seoul is the capital of South Korea. People are...