托福听力

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Listen to part of a lecture in an environmental science class. Today we're going to talk about the concept of 'ecological footprint.' Now, this is a measure of the demand humans place on the Earth's ecosystems. It calculates how much land and water area is required to produce the resources we consume and to absorb the waste we generate. For example, your diet, your transportation habits, and even your energy use at home all contribute to your footprint. But here's the key point: the average global footprint already exceeds the Earth's biocapacity, meaning we're using more than the planet can regenerate. This overshoot is not sustainable. So, what can we do? Reducing consumption is one obvious step, but technology also plays a role. For instance, renewable energy sources like solar and wind can lower our carbon footprint, which is a major component of the total. However, it's important to remember that individual actions alone aren't enough; policy changes and corporate responsibility are crucial too. The goal is to bring our footprint back within the planet's limits.