Why according to the passage, is biogas introduced to poor people?

Mark the letter A, B, C, or D on your answer sheet to indicate the word or phrase that is CLOSEST in meaning to the underlined part in each of the following questions

If the world's tropical forests continue to disappear at their present rate, many animal species will become extinct.

Human beings (24) ______ to protect only the beautiful and non-threatening parts of our environment. We tend to pay more (25) _______ to animals on land than any other large sea animals. Environmentalists have not done much enough to help save the Pacific Ocean sharks (26) _______ population has decreased nearly to the point of extinction.

Sharks are among the oldest creatures on Earth, having survived in the seas for more than 350 million years. The fact that they have managed to live in the oceans for so many millions of years is enough proofs of their efficiency and adaptability to change environments.

It's time (27) _______ human beings to begin considering the protection of                                                                                            sharks as important part of a program for protection of our natural (28) ________

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions

He is the postman _________ I got this letter.

The human race is only one small species in the living world. Many ______ species exist on this planet.

It's the best film _______ has ever been made about madness.

The government sent money and food to the people ________ houses were destroyed by the storm last week.

We have stopped buying goods from that shop as most of them are _____ poor quality.

The boy is called Duncan. He sits next to me in class.

Coal, oil, and forests are the most important __________ resources.

Environmentalists have not done much enough to help save the Pacific Ocean sharks (26) _______ population has decreased nearly to the point of extinction.