No início de sua formação, há mais de 5 bilhões de anos, a Terra era diferente. O tempo foi passando e a superfície da Terra, os oceanos e a atmosfera foram se formando. Havia muitos vulcões e era impossível existir vida. Que características, durante a transformação do planeta, ajudaram a favorecer o desenvolvimento da vida? * 1 ponto
Resfriamento lento do planeta, formação de uma atmosfera e água no estado líquido.
Atmosfera e resfriamento rápido do planeta.
Os gases da atmosfera primitiva eram os mesmos da atmosfera atual e havia água no estado líquido em abundância.
Manutenção das altas temperaturas do planeta e vapor d’água na atmosfera.

a and b because with the other three, they simplify to something else.

answerpeople organize large projects such as levee-building;

it is very hard for the climatologists to precisely predict how will the global temperatures be changing so there's lots of models, some of which differ significantly, this is due to multiple factors, and probably the most important is the human activity.

humans have been a key factor in climate change around the globe since the start of the industrial revolution, and in the past few decades the consequences are becoming more obvious. there's lots of emission of pollutants in the atmosphere as well as changing the environment on the surface itself, so it's really hard to predict how will that go in the future because there's some countries that are reducing the damage and are going towards green energy, while others are stubbornly continuing with pollution and damages to the environment.