全球气候变暖是由于大气中吸热气体浓度增加所引起的；
The planet is warming due to increased concentrations of heat-trapping gases in our atmosphere;
全球变暖的原因是像二氧化碳这样的吸热气体，被滞留在大气层中，导致地球温度上升。
Global warming occurs when heat-trapping gases, such as carbon dioxide, get trapped in the atmosphere, causing the Earth's temperature to rise.
耕作还会将土壤中的二氧化碳释放到大气中，而免耕能够保持住土壤中的碳，并且避免机械设备释放吸热气体。
Tilling also releases carbon dioxide from the soil into the atmosphere. No-till keeps carbon in the soil and avoids the release of heat-trapping gases from motorized equipment.
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