First conditional, Explanation: We use the first conditional to talk about real and possible situations in the future and their consequences; Structure: If + simple present, will/can/etc. + infinitive; Example: If we reduce plastic waste, we will protect the environment., Second conditional, Explanation: We use the second conditional to talk about imaginary or unlikely situations in the present or future; Structure: If + simple past, would/could/etc. + infinitive; Example: If I were the president, I would invest more money in renewable energy., Third conditional, Explanation: We use the third conditional to talk about imaginary situations in the past that cannot be changed anymore; Structure: If + past perfect, would/could/etc. have + past participle; Example: If we had used less fossil fuel, we would have reduced CO₂ emissions.

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