They say that he is the best footballer of the decade.

• We use the present simple tense with "they say" to report what people believe to be true in general.

A fundraising event for poor children in the neighborhood is going to be organized.

• We use the passive voice with the future progressive tense ("going to be" + past participle) to emphasize that the event will be organized by someone else.

Their presentation on environmental protection is being practiced by the students.

• We can rephrase the sentence using the passive voice with the present continuous tense ("is being practiced") to focus on the action of practicing.

A green lifestyle is being adopted by more and more people.

• We can rephrase the sentence using the passive voice with the present continuous tense ("is being adopted") to show the increasing trend of adopting a green lifestyle.

Two people were reported to be seriously injured in the accident.

• We use the passive voice with the past perfect tense ("were reported to be" + past participle) to report what was said about an event in the past.