Bonjour

Il faut conjuguer les verbes en anglais soit au prétérit soit au présent perfect et expliquer son choix.
Merci

Read the text about climate change. Put the verbs into the correct form: Past Simple or Present Perfect. Use long forms if possible.

At the moment, scientists agree that the world's climate ..........................(become) warmer over the past 50 years, but they disagree about the causes. Some believe that human activities ...........................(cause) climate change. They argue that for 1,000 or 2,000 years before 1850, when records ...........................(begin) , the temperature was more or less stable. Short warm or cold periods .........................(occur) during that time, but the climate ...........................( always return) to the same level,
However, since the Industrial Revolution, human beings ..........................(burn) more and more fossil fuels, such as coal and oil. In 1800 the atmosphere .....................(contain) around 280 parts per million of carbon dioxide (CO2). Since then there ......................(be) an increase of about 31 %. This extra carbon dioxide .........................(raise) the world’s temperature because of the greenhouse effect.
Other scientists disagree that human activities over the past 50 years ......................(cause) global warming. They point out that volcanoes and other natural processes .........................(always release) CO2 into the atmosphere, and that human activity ......................(contribute) a rise in CO2 of only three per cent.
In 1999, 156 countries ................................(sign) the Kyoto protocol, part of a United Nations agreement on climate change, which .......................(come) into force in 2005. They ...............(agree) to reduce their emissions of CO2 and other greenhouse gases, although, some countries, such as the USA and Australia, ...............................(not take) any action so far.

At the moment, scientists agree that the world's climate became warmer over the past 50 years, but they disagree about the causes. Some believe that human activities caused climate change. They argue that for 1,000 or 2,000 years before 1850, when records began , the temperature was more or less stable. Short warm or cold periods occured during that time, but the climate always returned to the same level,

However, since the Industrial Revolution, human beings burning more and more fossil fuels, such as coal and oil. In 1800 the atmosphere contained around 280 parts per million of carbon dioxide (CO2). Since then there was an increase of about 31 %. This extra carbon dioxide raised the world’s temperature because of the greenhouse effect.

Other scientists disagree that human activities over the past 50 years caused global warming. They point out that volcanoes and other natural processes always released CO2 into the atmosphere, and that human activity contributed a rise in CO2 of only three per cent.

In 1999, 156 countries signed the Kyoto protocol, part of a United Nations agreement on climate change, which came into force in 2005. They agreed to reduce their emissions of CO2 and other greenhouse gases, although, some countries, such as the USA and Australia, didn’t took any action so far.

Voilà ! J’espère que ça t’aura aidé ? N’hésites pas à me poser des questions si tu en as ! Byyyye.

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