because of human activity. How do they know? Through careful study, they know that the climate 8) ___ WARM about 10 times 9) ___ FAST than the average previous warming times. They've also ruled out the natural factors that caused warming in the past. The Earth's average temperature 10) ___ INCREASE about 1.5°F in the past hundred years. It doesn't sound like much, but scientists think that the temperature increase has caused melting glaciers, droughts, and coral reefs dying off. They expect the climate will warm another 8.5°F to 8.6°F by the year 2100.

Разбираемся:

8) is getting

9) as

10) has

Вставим слова в текст:

because of human activity. How do they know? Through careful study, they know that the climate is getting WARM about 10 times as FAST than the average previous warming times. They've also ruled out the natural factors that caused warming in the past. The Earth's average temperature has INCREASE about 1.5°F in the past hundred years. It doesn't sound like much, but scientists think that the temperature increase has caused melting glaciers, droughts, and coral reefs dying off. They expect the climate will warm another 8.5°F to 8.6°F by the year 2100.