Consider the following statements:

1. Climate change is influenced by both natural and anthropogenic factors.

2. The Amazon rainforest is often referred to as the “lungs of the Earth”.

3. Current extinction rates are comparable to historical background rates.

4. Urbanization can negatively impact local biodiversity.

The correct statement(s) is/are:

Climate change is influenced by both natural and anthropogenic factors. Correct: While human activities (anthropogenic) like burning fossil fuels are the primary drivers of modern warming, natural factors also play a role. These include volcanic eruptions, variations in solar radiation, and natural cycles like Milankovitch cycles. The Amazon rainforest is often referred to as the “lungs of the Earth”. Correct: This is a popular metaphor based on the fact that the Amazon produces a significant amount of the world's oxygen and, more importantly, acts as a massive carbon sink, absorbing billions of tons of carbon dioxide during photosynthesis. Current extinction rates are comparable to historical background rates. Incorrect: Scientists estimate that the current rate of species extinction is 100 to 1,000 times higher than the "background" rate (the natural rate of extinction before human intervention). This has led many experts to conclude that we are currently in the midst of a "Sixth Mass Extinction. "Urbanization can negatively impact local biodiversity. Correct: Urbanization leads to habitat fragmentation, where large, continuous areas of habitat are broken into smaller, isolated patches. This makes it difficult for species to find food, mates, and migrate, often leading to a decrease in species richness. Comparison Summary Statement Validity Key Concept1. Climate Drivers True Mix of human $CO_2$ and natural solar/volcanic cycles.2. Amazon "Lungs"   True High rates of photosynthesis and carbon sequestration.3. Extinction Rates False Current rates far exceed natural historical background levels.4. Urbanization  True Leads to habitat loss and fragmentation.