A new clean technology to turn sunlight into liquid fuel could shrink the need for large plantations to grow crops for biofuels, Harvard University researchers said on Thursday.

That could help protect food supplies and local people's land rights, they suggested.

Dubbed "bionic leaf 2.0," the technology uses solar panels to split water molecules into oxygen and hydrogen, the scientists said in a study published in the journal Science.

Once separated, hydrogen is moved into a chamber where it is consumed by bacteria, and with help from a special metal catalyst and carbon dioxide, the process generates liquid fuel.

The method is an artificial version of the photosynthesis process plants use to make energy from sunlight, water and carbon dioxide, scientists said.

If it becomes economically viable, the technology could replace oil wells or plantations where food crops are grown for fuel, the study's lead author said.

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Part 7: Read the following passage and decide if the statements that follow TRUE or FALSE. (1.0 m)

Earth Day is a birthday! Just like a birthday is a special day to celebr a person, Earth Day is a special day that celebrates the Earth. It is a day to remember to take care of our planet.

Earth Day was born on April 22,1970, in San Francisco, California. It is now the largest, most celebrated environmental event worldwide. Every year, many countries around the world join together in the celebration of Earth Day on April 22nd. On Earth Day, people celebrate by doing things that help to protect the environment. Some things people do to help the Earth are: turn off the lights to conserve energy, plant trees, recycle, and pick up garbage in their communities.

You don't have to wait for Earth Day though, you can help the environment every day!

1. The first Earth Day was celebrated around the world.  _____
2. Earth Day is a day to take care of our planet, Earth.     _____
3. Every year, only a few countries celebrate Earth Day.  _____
4. Turning lights off is a way to save energy.                            _____

III. Read the passage and choose the correct answers.

Earth Day is a birthday! Just like a birthday is a special day to celebrate a person, Earth Day is a special day that celebrates the Earth. It is a day to remember to take care of our planet.

Earth Day was born on April 22, 1970, in San Francisco, California. It is now the largest, most celebrated environmental event worldwide. Every year, many countries around the world join together in the celebration of Earth Day on April 22nd. On Earth Day, people celebrate by doing things that help to protect the environment. Some things people do to help the Earth are: turn off the lights to conserve energy, plant trees, recycle, and pick up garbage in their communities.

You don’t have to wait for Earth Day though, you can help the environment every day!

1. What is Earth Day?

A. A person’s birthday                                            B. A special day to a person

C. A special day to the Earth.                                 D. A day to remember each other

2. When was Earth Day born?

3. The word It in line 4 refers to

4. Why do people celebrate Earth Day?

A. To protect the environment                               B. To turn off the lights

C. To plant trees                                                       D. To protect their houses

5. Which of the following is NOT true about the passage?

A. Earth Day is a birthday                                      B. Many countries join in the celebration

C. Turn off the lights to conserve energy             D. We can’t help the environment everyday

Earth Day is a birthday! Just like a birthday is a special day to celebrate a person. Earth Day is a special day that celebrates the Earth. It is a day to remember to take care of our planet.
Question 26. The first Earth Day was celebrated around the world.A. TrueB. FalseQuestion 27. Earth Day is a day to take care of our planet, Earth. ______A. TrueB. FalseQuestion 28. A few countries celebrate Earth Day. ______A. TrueB. FalseQuestion 29. On Earth Day, people do some good things that help the planet. ______A. TrueB. FalseQuestion 30. Turning lights off is a way to save energy. ______A. TrueB. False