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If we look at the first two sentences, we can see a slight problem. There is no transition from the idea of industrial pollution in the first sentence to the idea of the the warming of the earth in the second sentence. There is a kind of a hole between the two ideas and the reader can fall into that hole. Look at the sentences again.

The greenhouse effect is a phenomenon caused by industrial pollution. According to the data taken by scientists, our earth has been warming up since the Industrial Revolution.

We need to find some way to fill the hole and connect the two ideas. Can you think of a sentence that will serve as a good transition?